mn-18 mn-18 mn 18 is an indazole-based synthetic cannabinoid that is an agonist for the cannabinoid receptors, with ki values of 45.72 nm at cb1 and 11.098 nm at cb2 and ec50 values of 2.028 nm at cb1 and 1.233 nm at cb2, and has been sold online as a designer drug. it is the indazole core analogue of nne1. given the known metabolic liberation (and presence as an impurity) of amantadine in the related compound apinaca, it is suspected that metabolic hydrolysis of the amide group of mn-18 may release 1-naphthylamine, a known carcinogen. mn-18 metabolism has been described in literature. mn-18legal statuslegal status ca: schedule ii de: npsg (industrial and scientific use only) uk: class b identifiers iupac name n-(naphthalen-1-yl)-1-pentyl-1h-indazole-3-carboxamide cas number1391484-80-2 ypubchem cid119058030chemspider29763729uniigp2n1pg5x2comptox dashboard (epa)dtxsid301010033 chemical and physical dataformulac23h23n3omolar mass357.457 g·mol−13d model (jsmol)interactive image smiles cccccn1nc(c2c1cccc2)c(=o)nc1cccc2c1cccc2 inchi inchi=1s/c23h23n3o/c1-2-3-8-16-26-21-15-7-6-13-19(21)22(25-26)23(27)24-20-14-9-11-17-10-4-5-12-18(17)20/h4-7,9-15h,2-3,8,16h2,1h3,(h,24,27)key:ujkhlvoexuldru-uhfffaoysa-n legal status mn-18 is banned in sweden. on 15 september 2014 the turkey government banned the sale of mn-18.