The (3,5-Dimethylphenyl)magnesium bromide, with the CAS registry number 34696-73-6, is also known as Magnesium,bromo(3,5-dimethylphenyl)-. It belongs to the product categories of Aryl; Grignard Reagents; Organometallic Reagents. This chemical's molecular formula is C₈H₉BrMg and molecular weight is 209.37. What's more, its systematic name is bromo-(3,5-dimethylphenyl)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. It will react violently with water. It may form explosive peroxides. It is harmful if swallowed. 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. When using it, you need wear suitable protective clothing, gloves and eye/face protection. In case of accident or if you feel unwell seek medical advice immediately (show the label where possible).

You can still convert the following datas into molecular structure:
(1)SMILES: Cc1cc([Mg]Br)cc(C)c1
(2)InChI: InChI=1S/C8H9.BrH.Mg/c1-7-4-3-5-8(2)6-7;;/h4-6H,1-2H3;1H;/q;;+1/p-1
(3)InChIKey: XPXQQJMQESWIKM-UHFFFAOYSA-M