3H-5,10a-Ethano-1H-cyclohept[c]oxepin-8-carboxylic acid, 4-[(1E,3E)-4-carboxy-1,3-pentadienyl]-4,5,5a,6,7,10-hexahydro-5a-hydroxy-4-methyl-1-oxo-, methyl ester, (4R,5S,5aS,10aR)- AIDS-107323 AIDS107323 Pseudolaric acid C