Solagé® Topical Solution contains mequinol 2% and tretinoin 0.01%, by weight, in a solution base of ethyl alcohol (77.8% v/v), polyethylene glycol 400, butylated hydroxytoluene, ascorbic acid, citric acid, ascorbyl palmitate, edentate disodium and purified water. Mequinol is 4-hydroxyanisole, the monomethyl ether of hydroquinone or 1-hydroxy-4- methoxybenzene. It has the chemical formula, C₇H₈O₂, a molecular weight of 124.14, and the structural formula:

The chemical name for tretinoin, a retinoid, is (all-E)-3,7-dimethyl-9-(2,6,6-trimethyl-1- cyclohexen-1-yl)-2,4,6,8-nonatetraenoic acid, also referred to as all-trans-retinoic acid. It has the chemical formula, C₂₀H₂₈O₂, a molecular weight of 300.44, and the structural formula:

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