英文别名Bupivacaine Impurity 18; (S)-1-((R)-sec-butyl)-N-(2,6-dimethylphenyl)piperidine-2-carboxamide; Bupivacaine Impurity 12; Bupivacaine Impurity 4; Bupivacaine impurity 6; N-(2,6-dimethylphenyl)-1-[(1R)-1-methylpropyl]-(2S)-2-Piperidinecarboxamide; 2-Piperidinecarboxamide, N-(2,6-dimethylphenyl)-1-[(1R)-1-methylpropyl]-, (2S)- 
