AlviMopan DiastereoMer 1 Alvimopan Impurity 4 Alvimopan Impurity 2 Alvimopan Alvimopan (2R, 3S, 4S)-Isomer Alvimopan Impurity 7 Alvimopan Impurity 3 AlviMopan Sulfate (alphaS,3R,4R)-4-(3-Hydroxyphenyl)-3,4-dimethyl-alpha-(phenylmethyl)-1-piperidinepropanoic acid Alvimopan-d5 (Mixture of Diastereomers) Alvimopan Impurity 6 Alvimopan Impurity 1 Alvimopan Acyl-β-D-glucuronide Alvimopan (2S, 3S, 4S)-Isomer Alvimopan Impurity 9 Alvimopan Impurity 12 AlviMopan Phenolic Glucuronide (Mixture of isoMers) Alvimopan Impurity 11