This page uses content from Wikipedia and is licensed under CC BY-SA.


RB120 Mesylate.png
PubChem CID
Chemical and physical data
Molar mass506.74 g·mol−1
3D model (JSmol)

RB-120 (benzyl (2S)-2-{[(2S)-2-({[(2S)-2-amino-4-methylsulfanylbutyl]disulfanyl}methyl)-3-phenylpropanoyl]amino}propanoate) is an orally active analog of the drug RB-101.[1] It acts as an enkephalinase inhibitor, which is used in scientific research. Via intravenous administration, it is approximately three times as potent as RB-101 or twice as potent as the isolated (S,S) isomer of RB101. However, via i.p. administration it is approximately twice as potent as racemic RB-101 and about as potent as the isolated (S,S) isomer of RB101. During i.v. administration RB120 is approximately twice as weak as morphine in terms of analgesia, however it is 16x weaker during i.p. and p.o. administration.[1]


  1. ^ a b Noble, Florence; Smadja, Claire; Valverde, Olga; Maldonado, Rafaël; Coric, Pascale; Turcaud, Serge; Fournié-Zaluski, Marie-Claude; Roques, Bernard P. (1997). "Pain-suppressive effects on various nociceptive stimuli (thermal, chemical, electrical and inflammatory) of the first orally active enkephalin-metabolizing enzyme inhibitor RB 120". Pain. 73 (3): 383–391. doi:10.1016/S0304-3959(97)00125-5.