Dimethyl 1-{4-[4,5-bis­(methoxy­carbon­yl)-1,2,3-triazol-1-ylmethyl­carbon­yl]phen­yl}-1H-pyrazole-3,4-dicarboxyl­ate

In the title mol­ecule, C₂₁H₁₉N₅O₉, the dihedral angle between the mean planes of the triazole and pyrazole rings is 82.4 (1)°. In the solid state, symmetry-related mol­ecules are linked by weak inter­molecular C—H...O and C—H...N hydrogen bonds, having a graph-set motif of R₂²(10), to form chains running parallel to the a axis.

5-Phenoxy­methyl-1,3,4-oxadiazole-2(3H)-thione

In the title compound, C₉H₈N₂O₂S, the H atom of the thiol group has been transferred to the neighbouring N atom of the oxadiazole ring. Inter­molecular N—H...N hydrogen bonds exist between adjacent mol­ecules.