5f-ab-fuppyca 5f-ab-fuppyca 5f-ab-fuppyca (also known as az-037) is a pyrazole-based synthetic cannabinoid that is presumed to be an agonist of the cb1 receptor and has been sold online as a designer drug. it was first detected by the emcdda as part of a seizure of 540 g white powder in france in february 2015. 5f-ab-fuppycalegal statuslegal status ca: schedule ii de: npsg (industrial and scientific use only) uk: under psychoactive substances act identifiers iupac name n-(1-amino-3-methyl-1-oxobutan-2-yl)-1-(5-fluoropentyl)-5-(4-fluorophenyl)-1h-pyrazole-3-carboxamide cas number2044702-46-5 ypubchem cid129317827chemspider58191440unii2g6g797f5bchemical and physical dataformulac20h26f2n4o2molar mass392.451 g·mol−13d model (jsmol)interactive image smiles nc(c(c(c)c)nc(=o)c1=nn(c(=c1)c1=cc=c(c=c1)f)cccccf)=o inchi inchi=1/c20h26f2n4o2/c1-13(2)18(19(23)27)24-20(28)16-12-17(14-6-8-15(22)9-7-14)26(25-16)11-5-3-4-10-21/h6-9,12-13,18h,3-5,10-11h2,1-2h3,(h2,23,27)(h,24,28)/f/h24h,23h2key:gsxrdtdypsatde-uhfffaoysa-n the name az-037 is also used as a synonym for its structural isomer 5-fluoro-3,5-ab-pfuppyca. thus az-037 is being used as a synonym for two different compounds. 5-fluoro-3,5-ab-pfuppyca has been detected in synthetic cannabinoid smoke blends in the usa as early as december 30, 2021, along with adb-butinaca, mda-19 (bzo-hexoxizid) and mdmb-4en-pinaca. 5-fluoro-ab-pfuppyca contains some similar structural elements to other synthetic cannabinoids such as ab-chfupyca, jwh-307, jwh-030, jwh-147, ab-pinaca. it may be considered an analog of the traditional pyrazole cannabinoid receptor 1 antagonist rimonabant. the pharmacological properties of 5f-ab-fuppyca have not been studied.