Categories Articles RCS-4 C4 homologue Post author By forendex.southernforensic Names: RCS-4 C4 homologue (primary) (1-Butyl-1H-indol-3-yl)(4-methoxyphenyl)methanone (IUPAC) Molecular formula: C20H21NO2 Nominal mass: 307 Average mass: 307.3862 Monoisotopic mass: 307.157229 CAS registry number: ChemSpider: 29341521 PubChem: 57507905 Wikipedia: RCS-4 Erowid: Drugs-Forum: RCS-4 Bluelight: RC’s Standard InChI: InChI=1S/C20H21NO2/c1-3-4-13-21-14-18(17-7-5-6-8-19(17)21)20(22)15-9-11-16(23-2)12-10-15/h5-12,14H,3-4,13H2,1-2H3 Standard InChI key: INTUAOVLJFCJIP-UHFFFAOYSA-N SMILES: CCCCn1cc(c2c1cccc2)C(=O)c1ccc(cc1)OC Tags: cannabinoid ← 1-Methyl-4-phenyl-4-propionoxypiperidine → Phenadoxone