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Lobelanine Lobeline EP Impurity B LOBELANINE Hydrochloride Lobeline EP Impurity B HCl Lobeline HCl EP Impurity B Lobeline HCl EP Impurity B HCl 1-Methyl-2,6-bisphenacylpiperidine 2,2'-(1-Methyl-2,6-piperidinediyl)diacetophenon Lobeline Impurity 2（Lobeline EP Impurity B HCl） 1-Methyl-2α,6α-bis[2-oxo-2-phenylethyl]piperidine 2,2'-(1-Methyl-2,6-piperidinediyl)bis(1-phenylethanone 2-[(2R,6S)-1-methyl-6-phenacylpiperidin-2-yl]-1-phenylethanone 2-[(2R,6S)-1-methyl-6-phenacyl-2-piperidinyl]-1-phenylethanone 2,2'-[(2α,6α)-1-Methyl-2,6-piperidinediyl]bis(1-phenylethanone) 2,2'-[(2β,6β)-1-Methyl-2,6-piperidinediyl]bis(1-phenylethanone) 2,2'-((2R,6S)-1-methylpiperidine-2,6-diyl)bis(1-phenylethanone) Ethanone, 2,2'-(1-methyl-2,6-piperidinediyl)bis[1-phenyl-, (2R,6S)-rel-