If you look at the names, "r-mmc" and 3,4-dimethyl-N-ethcathinone are nothing alike.
If 3,4-dimehyl-N-ethacthinone would be 3,4-DMEC (which it is).
then r-mmc would 'expand' to R-methylmethcathinone.
Now the R
in front of methylmethcathinone, could be a variable that goes from 2 to 6, depending on where the Methyl group attaches it's self to the Benzine ring.
We could have fun and try to name every single possible relative to Mephedrone
(4-MMC), but I doubt we'll ever find a molecule who's name is r-MMC.
Plus the R
can't mean an atom in it's self... I'll just check that... No, as I though, the R
doesn't represent an atom either, there are no atoms on the periodic table who's symbol is R. There's Ra
for Radium for example, or Rh
, but not R
it's self. So this is not a mephedrone like compound with a new atom hanging on it either.
I doubt that there really is a new compound under the name r-mmc, that is really different enough from mephedrone to not be called mephedrone.
If the r is a variable that goes from 2 to 6, r-mmc could be the group of compounds that contains 4-MMC as we know it, but also: 2-MMC, 3-MMC, 5-MMC, etc...
These compound may probably exist, and there potency may more or less strongly differ from that of Mephedrone. But, i don't think it's worth much research.