(3R,5S,6aS,7R,8R,10S,10aS)-1,3-bis(acetyloxy)-10-hydroxy-7,8-dimethyl-7-[(2E)-3-methylpenta-2,4-dien-1-yl]-3,5,6,6a,7,8,9,10-octahydronaphtho[1,8a-c]furan-5-yl rel-2-methylpropanoate Casearvestrin A InChI=1/C28H40O8/c1-9-16(4)10-11-27(8)17(5)12-23(31)28-21(13-20(14-22(27)28)35-24(32)15(2)3)25(33-18(6)29)36-26(28)34-19(7)30/h9-10,13,15,17,20,22-23,25-26,31H,1,11-12,14H2,2-8H3/b16-10+/t17-,20-,22+,23+,25+,26?,27-,28-/m1/s Isobutyric acid 1,3-diacetoxy-10-hydroxy-7,8-dimethyl-7-(3-methyl-penta-2,4-dienyl)-3,5,6,6a,7,8,9,10-octahydro-2-oxa-cyclopenta[d]naphthalen-5-yl ester propanoic acid, 2-methyl-, (3R,5S,6aS,7R,8R,10S,10aS)-1,3-bis(acetyloxy)-3,5,6,6a,7,8,9,10-octahydro-10-hydroxy-7,8-dimethyl-7-[(2E)-3-methyl-2,4-pentadienyl]-1H-naphtho[1,8a-c]furan-5-yl ester