One can notice that all studied compounds possessing cationic (onium: trimethylammonium, methylcycloalkylammonium, or pyridinium) substituents at 2 and 6 methylene of the DHP cycle have more or less significant ARA.
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One can notice that all studied compounds possessing cationic (onium: trimethylammonium, methylcycloalkylammonium, or pyridinium) substituents at 2 and 6 methylene of the DHP cycle have more or less significant ARA.