1,4-Methano-s-indacene-3a(1H)-carboxylic acid, 4-formyl-4,4a,5,6,7,7a,8,8a-octahydro-7-methyl-3-(1-methylethyl)-8a-[[[(3R,5S)-5-methyl-1-(phenylmethyl)-3-pyrrolidinyl]oxy]methyl]-, (4aR,7R,7aR)- AIDS-154296 AIDS154296