69912-64-7 (4S)-2,3,4,4aβ,5,6,7,11,12,12b-Decahydro-4,12bα-dimethyl-7-oxo-1H-naphtho[1,2:5,6]cyclohepta[1,2-b]furan-4α-carboxylic acid 69913-56-0 17,3-(Epoxymethano)-1,17:2,6-dimethano-17Hnaphtho[ 1,2-f]furo[3,4-b:2,3-c']bisoxocin-4,8,- 11,21(1H,8aH,10bH)-tetrone,2,3,6,6a,9,10,10a,- 15,16,16a-decahydro-8a,15-dihydroxy-2,6a,- 10b-trimethyl-,(1S,2S,3S,6R,6aS,8aS,10aS,- 10bR,15S,16aR,17R,18aR)-