1-Methylethyl 2-methyl-2-(4-(1-oxopentyl)phenoxy)propanoate 2-Methyl-2-(4-(1-oxopentyl)phenoxy)propanoic acid 1-methylethyl ester 42019-16-9 BRN 1996383 Propanoic acid, 2-methyl-2-(4-(1-oxopentyl)phenoxy)-, 1-methylethyl ester