(1S,3S,4S,5R,6R,7R)-6-Acetoxy-1-((4S,5R)-4-acetoxy-5-methyl-3-methylene-6-phenyl-hexyl)-4,7-dihydroxy-2,8-dioxa-bicyclo[3.2.1]octane-3,4,5-tricarboxylic acid AIDS-027713 AIDS027713 SQUALESTATIN ANALOG 15