ab-chfupyca ab-chfupyca ab-chfupyca (also ab-chmfuppyca) is a compound that was first identified as a component of synthetic cannabis products in japan in 2015. the name "ab-chfupyca" is an acronym of its systematic name n-(1-amino-3-methyl-1-oxobutan-2-yl)-1-(cyclohexylmethyl)-3-(4-fluorophenyl)-1h-pyrazole-5-carboxamide. there are two known regioisomers of ab-chfupyca: 3,5-ab-chmfuppyca (pictured) and 5,3-ab-chmfuppyca. the article refers to both 3,5-ab-chmfuppyca and 5,3-ab-chmfuppyca as ab-chmfuppyca isomers, so ab-chmfuppyca and ab-chfupyca are not names for a unique chemical structure. ab-chfupycalegal 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-(cyclohexylmethyl)-3-(4-fluorophenyl)-1h-pyrazole-5-carboxamide cas number1870799-79-3 ypubchem cid122213879chemspider67168777uniio4ps4bdb8kchemical and physical dataformulac22h29fn4o2molar mass400.498 g·mol−13d model (jsmol)interactive image smiles o=c(nc(c(n)=o)c(c)c)c1=cc(c2=cc=c(f)c=c2)=nn1cc3ccccc3 inchi inchi=1s/c22h29fn4o2/c1-14(2)20(21(24)28)25-22(29)19-12-18(16-8-10-17(23)11-9-16)26-27(19)13-15-6-4-3-5-7-15/h8-12,14-15,20h,3-7,13h2,1-2h3,(h2,24,28)(h,25,29)key:ndyoovjizqtghy-uhfffaoysa-n ab-chfupyca contains some similar structural elements to other synthetic cannabinoids such as 5f-ab-fuppyca, 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 ab-chfupyca have not been studied.