tBuO2CCH2-D-Dpa-Pro-NH-CH2-5-(2-CN)-thioph
((R)-1-{(S)-2-[(5-Cyano-thiophen-2-ylmethyl)-carbamoyl]-pyrrolidine-1-carbonyl}-2,2-diphenyl-ethylamino)-acetic acid tert-butyl ester
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