(1beta,2alpha,12alpha,15beta)-1,2,12,20-tetrakis(acetyloxy)-11,16-dioxopicrasan-15-yl 2-methylbutanoate 2-methyl-butyric acid 2,10,11-tracetoxy-11c-acetoxymethyl-3,8,11a-trimethyl-1,5-dioxo-hexadecahydro-6-oxa-benzo[de]anthracen-4-yl ester 2-methyl-butyric acid 2,10,11-triacetoxy-11c-acetoxymethyl-3,8,11a-trimethyl-1,5-dioxo-hexadecahydro-6-oxa-benzo[de]anthracen-4-yl ester InChI=1/C33H46O13/c1-10-14(2)30(39)46-27-24-16(4)26(43-19(7)36)25(38)28-32(9)21(12-23(45-31(27)40)33(24,28)13-41-17(5)34)15(3)11-22(42-18(6)35)29(32)44-20(8)37/h14-16,21-24,26-29H,10-13H2,1-9H3/t14?,15-,16-,21+,22+,23-,24-,26-,27-,28-,29-,32+,33+/m1/s butanoic acid, 2-methyl-, (1beta,2alpha,12alpha,15beta)-1,2,12,20-tetrakis(acetyloxy)-11,16-dioxopicrasan-15-yl ester