MONOESTER OR DIESTER OF EITHER CINAMIC ACID OR ITS DERIVATIVE WITH VITAMIN C, ITS PRODUCTION, AND COSMETIC, MEDICINE AND NUTRIENT COMPOSITION CONTAINING SAME AS ANTIOXIDANT

摘要

Mono- and di-esters of cinnamic acid (or one of its derivs.) and vitamin C, of formula (I), are new. R1, R2, R3 = H, OH, alkoxy, fluoroalkoxy or alkylcarbonyloxy; R4 = H or -COR5; R5 = 1-20C alkyl or a gp. of formula (i).