1-((1,1-Dimethylethoxy)carbonyl)-L-prolyl-D-alanyl-N-methyl-L-alaninamide 103137-93-5 BPAAM L-Alaninamide, 1-((1,1-dimethylethoxy)carbonyl)-L-prolyl-D-alanyl-N-methyl- N-t-Boc-pro-ala-ala-nhch3 N-tert-Butyloxycarbonyl-prolyl-alanyl-alanyl-methylamide