(-)-Jervinone (17beta,23R)-4,5-didehydro-5,6-dihydro-17,23-epoxyveratraman-3,11-dione (23R)-17,23-epoxy-veratra-4,12-diene-3,11-dione 469-60-3 InChI=1/C27H37NO3/c1-14-11-21-24(28-13-14)16(3)27(31-21)10-8-19-20-6-5-17-12-18(29)7-9-26(17,4)23(20)25(30)22(19)15(27)2/h12,14,16,19-21,23-24,28H,5-11,13H2,1-4H3/t14-,16?,19-,20-,21+,23+,24-,26-,27-/m0/s spiro[9H-benzo[a]fluorene-9,2'(3'H)-furo[3,2-b]pyridine]-3,11-dione, 1,2,3'a,4',5,5',6,6',6a,6b,7,7',7'a,8,11a,11b-hexadecahydro-3',6',10,11b-tetramethyl-, (3a'S,6'S,6aS,6bS,7a'R,9R,11aS,11bR)-