2-(2-{1-Hydroxy-2-[2-(5-methoxycarbonylmethyl-2,5,8a-trimethyl-2-vinyl-octahydro-chromen-6-yl)-2-methyl-propionyloxy]-ethyl}-5-methoxycarbonylmethyl-2,5,8a-trimethyl-octahydro-chromen-6-yl)-2-methyl-propionic acid methyl ester 2H-1-benzopyran-5,6-diacetic acid, 2-[2-[2-[(2R,4aS,5R,6S,8aS)-2-ethenyloctahydro-5-(2-methoxy-2-oxoethyl)-2,5,8a-trimethyl-2H-1-benzopyran-6-yl]-2-methyl-1-oxopropoxy]-1-hydroxyethyl]octahydro-alpha~ Excoecarin R1 methyl ester InChI=1/C43H70O11/c1-15-38(6)20-16-29-40(8,25-33(46)50-13)28(17-21-41(29,9)53-38)37(4,5)35(48)52-26-31(44)43(11)23-19-30-39(7,24-32(45)49-12)27(18-22-42(30,10)54-43)36(2,3)34(47)51-14/h15,27-31,44H,1,16-26H2,2-14H3/t27-,28-,29+,30+,31-,38+,39-,40-,41+,4 methyl rel-2-[(2R,4aS,5R,6S,8aS)-2-[(1R)-1-hydroxy-2-({2-[(2R,4aS,5R,6S,8aS)-5-(2-methoxy-2-oxoethyl)-2,5,8a-trimethyl-2-vinyloctahydro-2H-chromen-6-yl]-2-methylpropanoyl}oxy)ethyl]-5-(2-methoxy-2-oxo