The reaction of 2-carboxy-benzaldehyde and hydrazine hydrate unexpectedly yielded the title compound, C(16)H(10)N(2)O(3), which comprises one phthalide ring, one phthalazine system and a chiral centre. The phthalide unit is almost perpendicular to the phthalazine system, forming a dihedral angle of 87.1 (3)°. The packing is governed by weak C-H⋯O hydrogen-bonding inter-actions, forming layers parallel to the ab plane.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2977671 | PMC |
| http://dx.doi.org/10.1107/S1600536809011970 | DOI Listing |
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