(3alpha,5xi,8alpha,9xi,10alpha,14alpha)-8,14-dihydroxy-12,16-epoxy-3,18-cycloabiet-13(15)-en-16-one 6H-cyclopropa[7,8]phenanthro[3,2-b]furan-6-one, 1,1a,1b,2,3,3a,4,7a,8,8a,8b,9,10,10a-tetradecahydro-3a,4-dihydroxy-1a,5,8b-trimethyl-, (1aS,3aR,4S,8bR,10aR)- InChI=1/C20H28O4/c1-10-15-12(24-17(10)22)8-14-18(2)6-4-11-9-19(11,3)13(18)5-7-20(14,23)16(15)21/h11-14,16,21,23H,4-9H2,1-3H3/t11-,12?,13?,14?,16+,18-,19+,20-/m1/s Suregadolide A