97280-48-3 L-Proline, 1-(N-(phenoxy(2-phenylethyl)phosphinyl)-L-alanyl)- N(alpha)-((2-Phenylethyl)phenoxyphosphoryl)-L-alanyl-L-proline N(alpha)-((2-Phenylethyl)phenoxyphosphoryl)alanylproline Ppp-ala-pro