The Magnesium,chloro[(4-methoxyphenyl)methyl]-, with the CAS registry number 38769-92-5, is also known as 4-Methoxyphenylmethylmagnesium chloride. It belongs to the product categories of Alkyl; Grignard Reagents; Organometallic Reagents. This chemical's molecular formula is C₈H₉ClMgO and molecular weight is 180.91. What's more, its systematic name is chloro-[(4-methoxyphenyl)methyl]magnesium. 

When you are using this chemical, please be cautious about it as the following:
It is highly flammable, so you should keep it away from sources of ignition - No smoking. This chemical will react violently with water, liberating extremely flammable gases. It may form explosive peroxides. It can cause burns. You must take precautionary measures against static discharges. In case of contact with eyes, you should rinse immediately with plenty of water and seek medical advice. You should be in case of fire use which is indicated in the space the precise type of fire-fighting equipment. If water increases the risk, you must never use water. When using it, you need wear suitable protective clothing, gloves and eye/face protection. In case of accident or if you feel unwell, you must seek medical advice immediately (show the label where possible).

You can still convert the following datas into molecular structure:
(1)SMILES: COc1ccc(C[Mg]Cl)cc1
(2)InChI: InChI=1S/C8H9O.ClH.Mg/c1-7-3-5-8(9-2)6-4-7;;/h3-6H,1H2,2H3;1H;/q;;+1/p-1
(3)InChIKey: XHDYUCUVUZSISM-UHFFFAOYSA-M