(6aS)-5,6,6a,7-Tetrahydro-2-methoxy-4H-dibenzo[de,g]quinoline-1,10-diol

The leaves of Croton sparsijlorus Morung yield this noraporphine alkaloid which crystallizes as colourless, slender needles from EtOH. Two hydroxyl groups and an imino group are present and the base yields crystalline salts and derivatives, e.g. the hydrochloride, [α]³⁰_D + 43° (H20); methiodide, m.p. 218°C (dec.); the O,N-diacetyl derivative, m.p. 245°C and the triacetyl derivative, m.p. 196-7°C. The N-methyl compound gives a crystalline methiodide, m.p. 236-8°C (dec.). The structure has been established as 2-methoxy-l : 10-dihydroxynor aporphine.

Chatterjee et al., Tetrahedron Lett., 1539 (1965)