(This is an organic compound. In order to explain its use in ancient texts, it is assumed that it has a specific application in ancient or similar situations.) This "1 - (methoxy) - 2 - ene - 4 - methoxy phenylnaphthalene" thing, in the past, its main uses were as follows.
One, or used in pharmaceuticals. At that time, doctors often searched for all kinds of wonderful prescriptions in the way of curing diseases and saving people. This thing or because of its unique chemical properties, it can participate in the synthesis of a certain kind of medicine to heal some diseases. Or it can help the blood and gas movement of the human body and the reconciliation of the viscera. For example, it can relieve the stagnation in the body, make the meridians unobstructed, and then relieve the pain and help the patient recover.
Second, in the dyeing and weaving industry, it may also have its uses. The ancient dyeing and weaving process pursued bright and lasting effects. The composition of this material may be used as a special dyeing aid to help the dye better adhere to the fabric, making the dyed color firmer, not easy to fade, and can add layers and unique charm to the fabric color, making the dyed fabric more beautiful and delicate. It is often used in the production of clothing of dignitaries to highlight its dignity and magnificence.
Third, it may also play a role in the field of fragrance preparation. The ancients were quite particular about spices and pursued the uniqueness and elegance of aroma. The scent characteristics of this product can be used as part of the fragrance formula to blend with other fragrances to create a unique fragrance. This fragrance can be used for court incense to create an elegant and solemn atmosphere; or it can be used for aristocratic sachet production, carried around, emitting a quiet aroma, adding personal charm and temperament.

(Chloromethyl) -2-chloro-4-methoxyphenyl ether. The physical properties of this substance are as follows:
It is usually a colorless to slightly yellow liquid with a special odor. Under normal temperature and pressure, the state is relatively stable, and parameters such as boiling point and melting point are crucial for its practical application. Generally speaking, the boiling point is in a specific range, which determines the temperature conditions at which the substance will change from liquid to gaseous state, which is of great significance for its distillation, separation and other operations. The melting point also has corresponding values. This is the critical temperature for the mutual transformation of solid and liquid states, which is related to the temperature requirements of its storage and use environment.
The density of this substance is moderate, which affects the stability and operating conditions of the system in the process of mixing with other substances or fluid transportation. At the same time, its solubility characteristics cannot be ignored. It is soluble in some organic solvents, but poor in water. This characteristic plays an important role in the selection of chemical reaction media, product separation and purification.
In addition, the refractive index of (chloromethyl) -2-chloro-4-methoxy phenyl ether also has a specific value. As one of the optical properties of the substance, the refractive index can be used to identify the substance and determine its purity. It has application value in the field of quality control and analysis and detection.

(Note: The chemical properties of "1- (cyanomethyl) -2-cyano-4-methoxybenzyl" in the question are related to the stability, and the following answer is in the style of ancient Chinese)
The chemical properties of husband "1- (cyanomethyl) -2-cyano-4-methoxybenzyl" are related to many factors, and its stability cannot be easily determined.
Cyanyl group is active and has nucleophilic ability. In "1- (cyanomethyl) -2-cyano-4-methoxybenzyl", the presence of cyanomethyl group and cyanyl group makes the molecular electron cloud distribution specific. The carbon-nitrogen triple bond in the cyanyl group, the electron cloud is biased towards the nitrogen atom, and the carbon terminal is positive, which is easy to be attacked by nucleophiles.
The methoxy group, which has the effect of an electron conductor, can increase the density of the electron cloud of the benzene ring. It coexists in molecules such as cyano and affects each other. The methoxy electron donor, or can stabilize the electron cloud around the benzene ring, is slightly slower to the activity of the cyano group.
However, in general, the inherent activity of the cyano group still exists. In the environment of strong acid and strong base, the cyano group is prone to hydrolysis. In acidic media, the cyano group gradually converts to a carboxyl group; in alkaline conditions, there are also other reaction pathways. And when heated, the intra-molecular energy increases, the vibration of active sites such as cyanyl groups intensifies, or reactions occur.
As for light, although it is not directly sensitive to common light, under specific wavelengths of light, it may cause intra-molecular electron transitions and cause structural changes.
Therefore, the chemical properties of "1- (cyanomethyl) -2-cyano-4-methoxybenzyl" are not absolutely stable. Under different environmental conditions, or a variety of chemical changes occur, which needs to be investigated in detail according to the specific situation.

(1) Preparation of raw materials
To prepare (1- (methoxy) -2 -chloro-4 -methoxy phenyl) ether, the corresponding halogenated aromatics, alcohols or phenolic compounds need to be prepared as starting materials. Halogenated aromatics such as chlorobenzene derivatives containing specific substituents, alcohols or phenols are selected with matching methoxy structure. And the raw materials need to be of high purity to avoid side reactions caused by impurities.
(2) Reaction step
1. ** Etherification reaction **: In an appropriate reaction vessel, add halogenated aromatics and alcohols or phenols according to a certain molar ratio, and add an appropriate amount of basic catalysts, such as potassium carbonate, sodium hydroxide, etc. Dissolve the substrate and catalyst in a suitable organic solvent. Commonly used organic solvents include N, N-dimethylformamide (DMF), dimethyl sulfoxide (DMSO), etc., to create a good reaction environment. Heat up to a specific temperature, which depends on the substrate activity and reaction type, generally between 60 and 120 ° C. Maintain the temperature and stirring speed to fully contact the reactants. The reaction takes several hours to tens of hours. The reaction process is monitored by thin-layer chromatography (TLC) or high-performance liquid chromatography (HPLC).
2. ** Separation and purification **: After the reaction is completed, the reaction solution is cooled to room temperature, and an appropriate amount of water is poured to dilute. The products, such as dichloromethane and ethyl acetate, are extracted with organic solvents, and the products are enriched in the organic phase after multiple extractions. The organic phases are combined and washed with saturated salt water to remove residual moisture and impurities, and then the organic phase is dried with anhydrous sodium sulfate or magnesium sulfate. After filtering and removing the desiccant, the organic solvent is distilled under reduced pressure to obtain a crude product. The crude product is further purified by column chromatography and recrystallization. The column chromatography selects suitable silica gel as the fixed phase, and the mixed liquid of petroleum ether and ethyl acetate in different proportions is used as the mobile phase. Appropriate solvents, such as ethanol and acetone, are selected for recrystallization. According to the solubility characteristics of the product, the final high-purity target product is obtained.
This preparation process requires fine regulation of various reaction parameters and strict control of the operation process to obtain the ideal yield and purity of (1- (methoxy) -2-chloro-4-methoxy phenyl) ether.

(1 - (hydroxymethyl) -2 -hydroxy- 4 -methoxyphenyl ethyl ether, hereinafter referred to as this substance) During storage and transportation, many precautions need to be carefully observed.
Temperature and humidity of the first environment. This physical property may change due to changes in temperature and humidity, and high temperature may easily cause it to decompose and deteriorate, and high humidity may cause deliquescence. Therefore, the storage place should be kept cool and dry. The temperature should be preferably [X] ° C to [X] ° C, and the relative humidity should be controlled between [X]% and [X]%.
times and packaging. The packaging must be tight and tight to prevent outside air, moisture and impurities from invading. It is usually packed in a sealed container, and the material used must have no chemical reaction with this substance. For example, special glass, plastic or metal containers are used to ensure that the packaging is intact and there is no risk of leakage.
In addition, this substance may have a certain chemical activity. When storing and transporting, it should be avoided to mix with oxidants, acids, alkalis and other substances. Because of its encounter with it, or violent chemical reaction, it can cause safety accidents.
During transportation, vibration and collision should also be paid attention to. Excessive vibration and collision may damage the packaging, and even affect the chemical structure of this substance. Therefore, the transportation vehicle should be smooth, take necessary shock absorption measures, and unload it lightly. It must not be operated brutally.
In addition, staff protection should not be ignored. When coming into contact with this object, it is advisable to wear appropriate protective equipment, such as protective clothing, gloves and goggles, to prevent it from coming into contact with the skin and eyes. If it comes into contact accidentally, rinse it with plenty of water quickly and seek medical attention in time.
Storage and transportation of this object, from ambient temperature and humidity, packaging, material compatibility, vibration and collision to personnel protection, every link is related to its quality and safety, and it must be treated with caution and must not be slack.