3,11-Dihydro-3,3-dimethylpyrano[3,2-a]carbazole-5-carbaldehyde

A carbazole alkaloid occurring in Murraya koenigii Spreng., this base forms colourless crystals from EtOH. It gives an ultraviolet spectrum showing three absorption maxima at 226, 284 and 301 mil. The structure has recently been revised, placing the formyl group in the second benzene ring of the carbazole nucleus.

Chakraborty, Das., Chern. Cornrnun., 967 (1966)
Revised structure: Joshi, Kamat, Gawad., Tetrahedron, 26, 1475 (1970)