In the mol-ecule of the title compound, C(19)H(20)N(4)O(4), the rings are almost coplanar, forming a dihedral angle of 0.76 (3)°. In the crystal structure, inter-molecular C-H⋯O hydrogen bonds link the mol-ecules.
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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2961144 | PMC |
http://dx.doi.org/10.1107/S1600536808003085 | DOI Listing |
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