2,4,8-Trimethyl-5-oxo-6-oxa-3,9-dithia-2,4,7-triazadec-7-enoic acid 1-methylethyl ester 6-Oxa-3,9-dithia-2,4,7-triazadec-7-enoic acid, 2,4,8-trimethyl-5-oxo-, 1-methylethyl ester 65907-51-9 BRN 2142638