(5R)-5,6-Dihydro-5,10-dihydroxy-9-methoxybenzo[g]-1,3-benzodioxolo[5,6-a]quinolizinium

This quaternary alkaloid occurs in Thalictrum fendleri Engelm and is isolated as the chloride which forms yellowish-brown crystals which decompose above 230°C without melting. The salt has [α]²⁵_D + 138° (MeOH) and gives an ultraviolet spectrum consisting of three absorption maxima at 233, 269 and 348 IT1J1.

Shamma, Dudock., Tetrahedron Lett., 3825 (1965)