5f-emb-pinaca 5f-emb-pinaca 5f-emb-pinaca (also known as emb-5f-pinaca according to the emccda framework for naming synthetic cannabinoids and 5f-aeb) is an indazole-based synthetic cannabinoid from the indazole-3-carboxamide family that has been sold online as a designer drug. 5f-emb-pinacalegal statuslegal status ca: schedule ii de: npsg (industrial and scientific use only) uk: class b identifiers iupac name ethyl (1-(5-fluoropentyl)-1h-indazole-3-carbonyl)-l-valinate cas numbernonechemspider58191441unii64osw0n4ybchemical and physical dataformulac20h28fn3o3molar mass377.460 g·mol−13d model (jsmol)interactive image smiles o=c(n(c(occ)=o)c(c)c)c1=nn(cccccf)c2=cc=cc=c21 inchi inchi=1s/c20h28fn3o3/c1-4-27-20(26)17(14(2)3)22-19(25)18-15-10-6-7-11-16(15)24(23-18)13-9-5-8-12-21/h6-7,10-11,14,17h,4-5,8-9,12-13h2,1-3h3,(h,22,25)/t17-/m0/s1key:ywsyumwekpnaht-krwdzbqosa-n it was first reported by the emcdda as part of a seizure of 149 grams of white powder in sweden in april 2015. legal status 5f-emb-pinaca is illegal in sweden as of 26. january 2016.