A-366 5MG. A-366, CAS Number: 1527503-11-2, Molecular Formula: C19H27N3O2, Molecular Weight: 329. 44, Purity: greater than or equal to 98% by HPLC, Appearance: Off-white solid, Synonym: 5'-Methoxy-6'-[3-(1-pyrrolidinyl)propoxy]spiro[cyclobutane-1, 3'-[3H]indol]-2'-amine, Size: 5MG