(3bR,4R,6aR)-3a-[({3-O-[(Benzyloxy)carbonyl]-6-deoxy-4-O-methyl-b-D-altropyranosyl}oxy)methyl]-7-formyl-1-isopropyl-4-methyl-3,3a,3b,4,5,6,6a,7-octahydro-7aH-3,7-methanocyclopenta[a]pentalene-7a-carboxylic acid AIDS-184351 AIDS184351