Description of MMB-CHMINACA
MDMB-CHMICA (also incorrectly known as MMB-CHMINACA) is an indole-based synthetic cannabinoid that is a potent agonist of the CB1 receptor and has been sold online as a designer drug. While MDMB-CHMICA was initially sold under the name "MMB-CHMINACA", the compound corresponding to this code name (i.e. the isopropyl instead of t-butyl analogue of MDMB-CHMINACA) has been identified on the designer drug market in 2015 as AMB-CHMINACA.
Chemistry of MMDB
Several commercial samples of MDMB-CHMICA were found to exclusively contain the (S)-enantiomer based on vibrational and electronic circular dichroism spectroscopy and X-ray crystallography. An (S)-configuration for the tert-leucinate group is unsurprising since MDMB-CHMICA is likely synthesized from the abundant and inexpensive "L" form of the appropriate tert-leucinate reactant.
Pharmacology of MDMB-CHMICA
MDMB-CHMICA acts as a highly potent full agonist of the CB1 receptor with an efficacy of 94% and an EC50 value of 0.14 nM, which is approximately 8 times lower than the EC50 of JWH-018 (1.13 nM) and twofold lower than AB-CHMINACA (0.27 nM).
Metabolism of MMDB
MDMB-CHMICA's main metabolic reactions comprise mono-hydroxylations and hydrolysis of the carboxylic ester function. In total, 31 metabolites could be identified in vivo.