WHAT DOES WHAT IS THE DIFFERENCE BETWEEN 3MMC AND 4MMC? MEAN?

Cathinones are differentiated by their ketone substitution on the beta carbon on the amphetamine skeleton, this means They may be β-keto-amphetamines. three-MMC has two methyl substitutions on its cathinone skeleton, a person at R3 in the phenyl ring, and also a next in the nitrogen group RN.Mephedrone. "Not for human intake. For technological use