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Monoamine receptors include those for serotonin and the catecholamines, but also histamine and melatonin. Catecholaminergic neurotransmitters are dopamine, adrenaline, and noradrenaline. The cathinone base sees substitution 

==Methylone==
* 3,4-methylenedioxy-N-methylcathinone (MDMC)
* C<sub>11</sub>H<sub>13</sub>NO<sub>3</sub> 207.229 g/mol
* Added to CSA Schedule I 2013-04-04
* Also known as βk-MDMA
** N-demethylation to MDC
** demethylation+O-methylation to HMMC/3-OH-4-MeO-MC

==Monkey dust==
* Methylenedioxypyrovalerone (MPDV)
* C<sub>16</sub>H<sub>21</sub>NO<sub>3</sub> 275.348 g/mol
* Banned under Synthetic Drug Control Act 2011-12-08

==Mephedrone==
* 4-methylmethcathinone (4MMC)
* C<sub>11</sub>H<sub>15</sub>NO 177.247 g/mol
* Banned under Synthetic Drug Abuse Prevention Act 2012-07-09

==Legislation==
===112th Congress===
* [https://www.congress.gov/bill/112th-congress/house-bill/1254 HR1254 Synthetic Drug Control Act of 2011]
* [https://www.congress.gov/bill/112th-congress/senate-bill/605 S605 Dangerous Synthetic Drug Control Act of 2011]
* [https://www.congress.gov/bill/112th-congress/house-bill/6312 HR6312 Synthetic Cathinones Control Act of 2012]
* [https://www.congress.gov/bill/112th-congress/senate-bill/3189 S3189 Synthetic Drug Control Act of 2012]
* [https://www.congress.gov/bill/112th-congress/senate-bill/3190 S3190 Synthetic Drug Abuse Prevention Act of 2012]
===115th Congres===
* [https://www.congress.gov/bill/115th-congress/house-bill/1732/titles HR1732 Synthetic Drug Control Act of 2017]