CCDC no.: 1434835 Source of materialThe title compound was obtained from the reaction of naphthalene-1,8-diamine and 4-methoxybenzaldehyde as described in literature [1] and recrystallized from a dichloromethane/petroleum ether solution at room temperature to give the desired crystals suitable for single-crystal X-ray di raction. Experimental detailsAll hydrogen atoms were added using the corresponding AFIX options of the SHELX system [12]. DiscussionPerimidines (peri-naphtho-fused pyrimidine systems) are of interest because they constitute an important class of natural products, which exhibit useful biological activities [2,3]. Moreover, perimidines have wide utility as synthons