139760-88-6 Carbamic acid, butyl-, 1-ethyl-1,2,3,3a,8,8a-hexahydro-3a-methylindeno(2,1-b)pyrrol-5-yl ester, cis-(+-)-, (R-(R*,R*))-2,3-bis((4-methylbenzoyl)oxy)butanedioate (1:1)