3,4,6-Trimethyl-1-phenyl-5-(thio­phen-3-yl)-1H-pyrazolo­[3,4-b]pyridine

In the title compound, C19H17N3S, the pyrazolo­[3,4-b]pyridine unit is slightly bowed across the C—C bond common to the two rings. In the crystal, ribbons extending along the a-axis direction are formed by C—H⋯π(ring) inter­actions. The ribbons are packed into corrugated layers inclined to the ac plane by approximately 22°. The thio­phenyl group is rotationally disordered over two sites 180° apart in a 0.606 (2)/0.394 (2) ratio.