(2R)-N-(2,6-dimethylphenyl)-1-propylpiperidine-2-carboxamide; UNII-0494L275Q6; Ropivacaine hydrochloride monohydrate specified impurity G [EP]; (R)-(+)-Ropivacaine; Ropivacaine,(R); (+)-(2R)-N-(2,6-Dimethylphenyl)-1-propylpiperidine-2-carboxamide; 2-Piperidinecarboxamide,N-(2,6-dimethylphenyl)-1-propyl-,(2R); Ropivacaine related compound B free base anhydrous