AIDS-005443 AIDS005443 Ala-NH-Azepin, Val-Val deriv. N-[2(S)-[3(R,S)-Benzyl-5-[1(S)-(alininylamino)-1-ethyl]-2,3,6,7-tetrahydro-1H-azepin-1-yl]-1-oxopropyl]valinylvaline, methyl ester