Synonyms: 9,19-Cyclo-3,4-secolanostane-3,26-dioicacid, 16,23-epoxy-4,23-dihydroxy-, g-lactone, methyl ester, (16a,23S,25R)-; Pseudolarolide C; Spiro[cyclopropa[2',3']benz[1',2':4,5]indeno[2,1-b]pyran-9(3aH),2'(3'H)-furan]-3a-propanoicacid,hexadecahydro-3-(1-hydroxy-1-methylethyl)-4',6a,7,11a-tetramethyl-5'-oxo-,methyl ester, [3R-[3a,3ab,4aS*,6aa,6bb,7b,9a(R*),10aa,11ab,11ba]]-