176181-83-2 3H,4H-Furo[3',4':3,4]naphtho[2,3-b]pyran-4-acetic acid, 1,5,6,7a,8,8a,11,12,12a,12b-decahydro-12-hydroxy-.alpha.,9,12a-trimethyl-1,6,11-trioxo-, methyl ester, (.alpha.R,3aS,4S,7aR,8aS,12S,12aS,12bR)- AIDS-026410 AIDS026410 Ailantinol A