(+)-Pronuciferine 2128-60-1 Milthanthine N,O-Dimethylcrotonosine N-Methylstepharine Pronuciferin Pronuciferine (7CI,8CI) Spiro(2,5-cyclohexadiene-1,7'-1'H-cyclopent(ij)isoquinolin)-4-one, 2',3',8',8'a-tetrahydro-5',6'-dimethoxy-1'-methyl-, (R)-