1,5-Dimethyl-2-phenyl-1H-pyrazol-3(2H)-one–4,4′-(propane-2,2-di­yl)bis­[1,5-dimethyl-2-phenyl-1H-pyrazol-3(2H)-one] (1/1)

The asymmetric unit of the title compound, C(11)H(12)N(2)O·C(25)H(28)N(4)O(2), contains two different mol­ecules. The smaller is known as anti­pyrine [systematic name: 1,5-dimethyl-2-phenyl-1H-pyrazol-3(2H)-one] and the larger is built up from two antypirine mol­ecules which are connected through a C atom of the pyrazolone ring to a central propanyl part [systematic name: 4,4′-(propane-2,2-di­yl)bis­[1,5-dimethyl-2-phenyl-1H-pyrazol-3(2H)-one]. Intra­molecular C—H⋯O hydrogen bonds occur in the latter mol­ecule. In the crystal, C—H⋯O hydrogen bonds link the mol­ecules into a two-dimensional network parallel to (001).