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Molecular structure of 1895 (A), which is N,N-dimethyl-2-(phenanthro[3,4-d][1,3]dioxol-5-yl)ethanamine, and 0020 (B), which is 2-(piperidin-1-ylmethyl)indeno[1,2,3-de]phthalazin-3-(2H)-one. Of interest, 1895 contains a methylenedioxy motif seen also in etoposide and some semisynthetic derivatives of camptothecin, which are topoisomerase poisons.
