(3aR,4R,9aS)-4-(1,3-benzodioxol-5-yl)-5,6,7-trimethoxy-3-oxo-1,4,9,9a-tetrahydronaphtho[2,3-c]furan-3a(3H)-yl rel-acetate 2alpha-Acetoxy-6-methoxypolygamatin Acetic acid 4-benzo[1,3]dioxol-5-yl-5,6,7-trimethoxy-3-oxo-1,4,9,9a-tetrahydro-naphtho[2,3-c]furan-3a-yl ester Erlangerin B InChI=1/C24H24O9/c1-12(25)33-24-15(10-30-23(24)26)7-14-9-18(27-2)21(28-3)22(29-4)19(14)20(24)13-5-6-16-17(8-13)32-11-31-16/h5-6,8-9,15,20H,7,10-11H2,1-4H3/t15-,20+,24-/m0/s naphtho[2,3-c]furan-1(3H)-one, 9a-(acetyloxy)-9-(1,3-benzodioxol-5-yl)-3a,4,9,9a-tetrahydro-6,7,8-trimethoxy-, (3aS,9R,9aR)-