2-(1-Benzo­thio­phen-2-yl)-4H-1,3,4-oxa­diazin-5(6H)-one

In the title compound, C₁₁H₈N₂O₂S, the oxadiazinone ring is nearly planar [maximum deviation = 0.016 (4) Å], and is approximately coplanar with the benzo­thio­phene ring system [dihedral angle = 3.1 (5)°]. In the crystal, mol­ecules are linked by N—H...O hydrogen bonds, forming chains running along the b-axis direction.

Crystal structure of dimethyl 3,3′-[(3-nitro­phen­yl)methyl­ene]bis­(1H-indole-2-carboxyl­ate) ethanol monosolvate

In the title compound, the planes of the two indole ring systems are approximately perpendicular to each other, with a dihedral angle of 89.3 (5)°.

Crystal structure of betulinic acid methanol monosolvate

The title compound [systematic name: 3β-hy­droxy­lup-20(29)-en-28-oic acid methanol monosolvate], C₃₀H₄₈O₃·CH₃OH, is a solvent pseudopolymorph of a naturally occurring plant-derived lupane-type penta­cyclic triterpenoid, which was isolated from the traditional Chinese medicinal plant Syzygium jambos (L.) Alston. The dihedral angle between the planes of the carb­oxy­lic acid group and the olefinic group is 12.17 (18)°. The A/B, B/C, C/D and D/E ring junctions are all trans-fused. In the crystal, O—H...O hydrogen bonds involving the hy­droxy and carb­oxy­lic acid groups and the methanol solvent mol­ecule give rise to a two-dimensional network structure lying parallel to (001).