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Most of these compounds , featuring open - ring forms of aliphatic amido - quaternary ammonium salts , exhibited potent anti - proliferative activities in human cancer cell lines , including PC - 3 , NUGC - 3 , MDA - MB - 231 , ACHN , HCT - 15 , and NCI - H23 .
 Chemical: aliphatic amido - quaternary ammonium salts
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 Chemical: aliphatic amido - quaternary ammonium salts