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Buy βk-2C-B its a substituted phenethylamine. It features methoxy substituents at R2 and R5 and a bromine at R4. A ketone group is present at the beta (β) position from the functional amine group connected to the alpha (α) carbon, giving rise to its name indicating it being a structural analogue of 2C-B. Because of the ketone functional group, it is correctly referred to as a ketophenethylamine. It has been mistakenly referred to as a "substituted cathinone" however cathinones by definition are ketoamphetamines and βk-2C-B is not an amphetamine.
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