129893-84-1 AIDS-029484 AIDS029484 Cyclo[N-methyl-L-.alpha.-aspartyl-N-methyl-L-isoleucyl-N-methyl-L-isoleucylglycyl-N-methyl-L-valyl-O-methyl-L-tyrosyl-(2S)-2-hydroxypropanoyl-(2S)-2-piperidinecarbonyl-N-methyl-L-valyl-L-valyl], 1,1-dimethylethyl ester SDZ 280-446