Racemic 5-(4-chlorophenyl)-2-methoxyindeno[1′,2′:2,3]pyrido[5,6-d] pyrimidine-4,6(3H,5H)-dione-dimethylformamide (1/1) and (5RS,5aSR,10bSR)-10b-hydroxy-2-methoxy-5-(4-methoxyphenyl)-5a,10b-dihydroindeno [1′,2′:2,3]pyrido[5,6-d]-pyrimidine-4,6 (3H,5H)dione-dimethylformamide (1/1): Chains of rings generated by N-H⋯O and C-H⋯π(arene) hydrogen bonds

1. Low, J.N.
2. Cobo, J.
3. Cisneros, C.
4. Quiroga, J.
5. Glidewell, C.