fdu-pb-22 fdu-pb-22 fdu-pb-22 is a derivative of jwh-018 that is presumed to be a potent agonist of the cb1 receptor, and has been sold online as a designer drug. fdu-pb-22legal statuslegal status ca: schedule ii de: anlage ii (authorized trade only, not prescriptible) uk: class b identifiers iupac name naphthalen-1-yl 1--1h-indole-3-carboxylate cas number1883284-94-3pubchem cid119025888chemspider29763739unii85e88884zqchemical and physical dataformulac26h18fno2molar mass395.433 g·mol−13d model (jsmol)interactive image smiles o=c(oc1=c(c=cc=c2)c2=cc=c1)c3=cn(cc4=cc=c(f)c=c4)c5=c3c=cc=c5 inchi inchi=1s/c26h18fno2/c27-20-14-12-18(13-15-20)16-28-17-23(22-9-3-4-10-24(22)28)26(29)30-25-11-5-7-19-6-1-2-8-21(19)25/h1-15,17h,16h2key:rceksvifqkkfls-uhfffaoysa-n pharmacology fdu-pb-22 acts as a full agonist with a binding affinity of 1.19nm at cb1 and 2.43nm at cb2 cannabinoid receptors. legal status fdu-pb-22 is a controlled substance in germany and is banned in japan and sweden.