AMB-FUBINACA which in the chemical nomenclature is also known as FUB-AMB is an indazole- constituted synthetic designer cannabinoid and it is also considered to be a strong agonist for CB1 receptor. The CAS No. of the drug is 1971007-92-7. AMB-FUBINACA exists in the form of powder and it is listed as a research chemical. Buy Research Chemicals Crystal (26) … Purity: ≥99.9%, Formula: C21H22FN3O3