In the title naphthalimide derivative, C23H26N2O6, the 1,8-naphthalimide system is essentially planar [maximum deviation = 0.0456&#8197;(16)&#8197;&#197;]. A characteristic pattern of alternating long and short C&#8212;C bond lengths is observed in the 1,8-naphthalimide unit. The mean planes through the methyl carbamate and acetic acid groups form dihedral angles of 42.30&#8197;(9) and 61.59&#8197;(9)&#176;, respectively, with the 1,8-naphthalimide plane. In the crystal structure, intermolecular O&#8212;H...O and C&#8212;H...O hydrogen bonds link neighbouring molecules, forming R22(9) hydrogen-bond ring motifs. These rings are further interconnected by intermolecular N&#8212;H...O and C&#8212;H...O hydrogen bonds into a three-dimensional supramolecular network
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