sesquiterpene lactone santamarin (+)-santamarine (3aS)-2,3,3abeta,4,5,5a,6,7,9abeta,9balpha-Decahydro-6alpha-hydroxy-5aalpha,9-dimethyl-3-methylenenaphtho[1,2-b]furan-2-one (3aS,5aR,6R,9aS,9bS)-6-Hydroxy-5a,9-dimethyl-3-methylene-3a,4,5,5a,6,7,9a,9b-octahydro-3H-naphtho[1,2-b]furan-2-one (3aS,5aR,6R,9aS,9bS)-6-hydroxy-5a,9-dimethyl-3-methylidene-3a,4,5,5a,6,7,9a,9b-octahydronaphtho[1,2-b]furan-2(3H)-one (3aS,5aR,6R,9aS,9bS)-6-hydroxy-5a,9-dimethyl-3-methylidene-4,5,6,7,9a,9b-hexahydro-3aH-benzo[g][1]benzofuran-2-one 248.31750 A sesquiterpene lactone of the eudesmanolide group. Balchanin Beilstein:1287299 C15H20O3 CAS:4290-13-5 CHEBI:244416 CHEBI:9023 InChI=1S/C15H20O3/c1-8-4-5-11(16)15(3)7-6-10-9(2)14(17)18-13(10)12(8)15/h4,10-13,16H,2,5-7H2,1,3H3/t10-,11+,12+,13-,15-/m0/s1 KEGG:C09544 KNApSAcK:C00003363 PLSSEPIRACGCBO-PFFFPCNUSA-N PMID:6476889 Santamarin [H][C@@]12[C@H]3OC(=O)C(=C)[C@@H]3CC[C@@]1(C)[C@H](O)CC=C2C chebi_ontology santamarin santamarine