The title compound, C12H13N3OS, was synthesized via the Willgerodt–Kindler method. The benzimidozole moiety is essentially planar (r.m.s. deviation = 0.0084 Å). The thioamide group is inclined by 54.80 (14)° to the benzimidazole ring system. The morpholine ring is disordered over two sets of sites [ratio 0.841 (11):0.159 (11)], with chair conformations for both components. In the crystal, molecules are linked into N—H...N hydrogen-bonded chains running parallel to the c axis. Hirshfeld surface analysis was used to quantify the intermolecular interactions.

The title coumarin derivative, C15H16O5, was isolated from the roots of Sophora japonica. The coumarin (2H-chromen-2-one) fragment is almost planar, with an r.m.s. deviation of 0.0356 Å. The carbon atom of the methoxy substituent is coplanar with the benzopyran oxa-heterocycle. The 3-methylbut-2-enyloxy group is disordered over two sets of sites with occupation factors of 0.920 (3) and 0.080 (3). In the crystal, molecules are linked by O—H...O and C—H...O hydrogen bonds into chains propagating along the [101] direction.