157381-54-9 AIDS-006311 AIDS006311 RPI-856 A Val-ADPAA-Leu-AOPBA-Val-Val-Asp Valyl-[2-amino-2-(3,5-dihydroxyphenyl)acetic acid]-leucyl-[3-amino-2-oxo-4-phenylbutyric acid]-valyl-valyl-aspartic acid, diastereomer of RPI-856B