123952-14-7 AIDS-000529 AIDS000529 Butanoic acid, L-2-aminobutanoyl-L-threonyl-L-asparaginyl-L-tyrosyl-L-2-amino- H-.alpha.-Aminobutyric acid-Thr-Asn-Tyr-.alpha.-Aminobutyric acid-OH H-Abu-Thr-Asn-Tyr-Abu-OH