?-MAPI

SP-Chymostatin B

Nα-[[[(1S)-1-Carboxy-2-phenylethyl]amino]carbonyl]-L-Arg-L-Val-[(1S)-1-formyl-2-phenylethyl]NH2

Nα-[N2-[[[(1S)-1-Carboxy-2-phenylethyl]amino]carbonyl]-L-arginyl]-N-[(1S)-1-formyl-2-phenylethyl]-L-valinamide