(2S)-2-acetamido-N-[(3S,9S,12S,15R,18S)-15-(cyclohexylmethyl)-9-[3-(diaminomethylideneamino)propyl]-12-(1H-indol-3-ylmethyl)-2,8,11,14,17-pentaoxo-1,7,10,13,16-pentazabicyclo[16.3.0]henicosan-3-yl]-3-phenylpropanamide (2S)-2-acetamido-N-[(3S,9S,12S,15R,18S)-15-(cyclohexylmethyl)-9-(3-guanidinopropyl)-12-(1H-indol-3-ylmethyl)-2,8,11,14,17-pentaoxo-1,7,10,13,16-pentazabicyclo[16.3.0]henicosan-3-yl]-3-phenyl-propanamide (2S)-2-acetamido-N-[(3S,9S,12S,15R,18S)-15-(cyclohexylmethyl)-9-(3-guanidinopropyl)-12-(1H-indol-3-ylmethyl)-2,8,11,14,17-pentaoxo-1,7,10,13,16-pentazabicyclo[16.3.0]henicosan-3-yl]-3-phenylpropanamide (2S)-2-acetamido-N-[(3S,9S,12S,15R,18S)-15-(cyclohexylmethyl)-9-(3-guanidinopropyl)-12-(1H-indol-3-ylmethyl)-2,8,11,14,17-pentaketo-1,7,10,13,16-pentazabicyclo[16.3.0]henicosan-3-yl]-3-phenyl-propionamide (2S)-2-acetamido-N-[(3S,9S,12S,15R,18S)-15-(cyclohexylmethyl)-9-[3-(diaminomethylideneamino)propyl]-12-(1H-indol-3-ylmethyl)-2,8,11,14,17-pentaoxo-1,7,10,13,16-pentazabicyclo[16.3.0]henicosan-3-yl]-3-phenyl-propanamide PMX-53 AcF-[OP(D-Cha)WR]