5923 SIGMA (−)-Cotinine ≥98% Synonym: (S)-1-Methyl-5-(3-pyridyl)-2-pyrrolidinone, S(−)-1-Methyl-5-(3-pyridyl)-2-pyrrolidone CAS Number: 486-56-6 C10H12N2O Molecular Weight: 176.22 assay ≥98% bp 250 °C/150 mmHg(lit.) mp 40-42 °C(lit.) storage temp. 2-8°C
