Synonyms: 9,19-Cyclo-A-homo-4-oxalanostan-26-oicacid, 16,23-epoxy-23-hydroxy-3-oxo-, g-lactone, (16a,23S,25R)-; Pseudolarolide D;Spiro[3H,6H,11H-cyclopropa[1,8a]pyrano[3'',2'':3',4']cyclopenta[1',2':5,6]naphth[2,1-c]oxepin-11,2'(5'H)-furan]-3,5'-dione,octadecahydro-1,1,4',8a,9,13a-hexamethyl-, [8aR-[5aR*,6aS*,8aa,8bb,9b,11a(R*),12aa,13ab,13ba,15ab]]-