1-Benzyl-3-methyl-3′,5′-diphenyl­spiro­[quinoxaline-2(1H),2′(3′H)-1,3,4-thia­diazole]

In the title spiro compound, C(29)H(24)N(4)S, the quinoxaline and thia­diazole ring systems share a common C atom; their mean planes are aligned at 87.0 (1)° in one mol­ecule and at 84.1 (1)° in the other independent mol­ecule. The thia­zole ring possesses two aromatic ring substituents and is roughly coplanar with these rings [the dihedral angles between the thia­diazole and phenyl rings are 10.7 (1) and 11.7 (1)° in one mol­ecule, and 16.8 (1) and 17.7 (1)° in the other]. The aromatic ring of the benzyl unit of one mol­ecule is disordered over two orientations in a 1:1 ratio.