97280-42-7 Bnp-ala-pro L-Proline, 1-(N-(bis(4-nitrophenoxy)phosphinyl)-L-alanyl)-, 1,1-dimethylethyl ester N(alpha)-(Bis(4-nitrophenoxy)phosphoryl)-L-alanyl-L-proline N(alpha)-(Bis(4-nitrophenoxy)phosphoryl)alanylproline