A Possible Synthetic Precursor to the Tropoloisoquinoline Alkaloid Pareirubrine A

X-ray analysis established that in the title compound, (6b[alpha],7[alpha],10[alpha],10a[alpha])-7,7a,8,9,10,10a-hexahydro-10,10a-dihydroxy-4,5,6,8,8- pentamethoxycyclopropa[1,2-d]indeno[1,2,3-ij]isoquinolin-9-one trichloromethane solvate, C₂₁H₂₃NO₈.CHCl₃, a potential precursor to the natural product pareirubrine A, the cyclopropane ring and the two hydroxy groups reside on the same face of the cyclohexane ring to which they are attached.

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