104531-07-9 Cpap-E N-(1(S)-Carboxy-(4-OH-3-(125)iodopheny)ethyl)-ala-pro N-(1(S)-Carboxy-(4-OH-3-iodophenyl)ethyl)-ala-pro N-(1(S)-Carboxy-(4-hydroxy-3-iodophenyl)ethyl)-alanylproline