6,7-Di­methoxy-2-methyl-3,4-di­hydro­isoquinolin-1(2H)-one

In the title compound, C₁₂H₁₅NO₃, the iso­quinoline moiety is essentially planar, except for the N and adjacent Csp³ atoms, which deviate from the mean plane by 0.198 (2) and 0.686 (2) Å, respectively. The bond length between the N and carbonyl C atoms [1.353 (3) Å] is close to a double-bond value, indicating electron delocalization. No significant intermolecular interactions are observed.

ent-(8S,10R)-15,16-Epoxy-19-norcleroda-4,11,13(16),14-tetraene-18,6(R):20,12-diolactone (isocrotocaudin)

The title compound, C₁₉H₁₈O₅, is a diastereoisomer of crotocaudin, both being isolated from the plants of genus Croton. In isocrotocaudin, the furan moiety makes a dihedral angle with the adjacent lactone of 13.53 (17)°. The cyclo­hexyl ring of the diterpene moiety adopts a chair confirmation. The weak intermolecular C—H...O hydrogen bonds link the mol­ecules into linear chains along the c axis.