Phenylhydrazones, the manufacture thereof and therapeutic and cosmetic compositions prepared therefrom

Abstract From the Canadian patent

A Phenylhydrazone of formula I:, in which R1, R2, and R3 are independently of one another hydrogen halogen, C1-C4-alkyl, hydroxyl, C1-C4-alkoxy or acetoxy R4 is hydrogen, hydroxyl, tert.-butyl, C1-C6-alkoxy or C2- C6-alkoxyalkyl, R5 is hydrogen or C1-C4-alkyl or, R4 and R5 together form a ring which is -C(CH3)2-A-C(CH3)2-(where A is -CH2CH2- -CH(CH3)-, -CH2C(O)-or-CH2CHOH-) or is -(CH2)3C(CH3)2- -OCH2CH2C(CH3)2-, -C(CH3)2CH(CH3)CH2C(CH3)2- or -NHC(O)CH2C(CH3)2-, where R4 and R5 together form a ring of the type specified or R4 is branched C4-C6-alkoxy or branched C4-C6-alkoxyalkyl when R1, R2 and R3 are each hydrogen, R6 is hydrogen, methyl, ethyl or cyclopropyl m and n are different and …