2,9,10-Trimeth­oxy­dibenzo[b,d]oxepin-7(6H)-one

The title compound, C₁₇H₁₆O₅, was prepared through a cyclization reaction of 2-(3',4',5-trimeth­oxy­biphenyl-2-yl­oxy)acetyl chloride. The two benzene rings form a dihedral angle of 34.55 (5)°. The crystal structure does not feature any hydrogen bonds.

3a,11b-Dihy­droxy-3a,11b-dihydro-1H-imidazo[4,5-f][1,10]phenanthroline-2(3H)-thione

The title compound, C₁₃H₁₀N₄O₂S, was prepared through a cyclization reaction of 1,10-phenanthroline-5,6-dione and thio­urea. The dihedral angle between the pyridine rings is 8.22 (2)°. In the crystal, mol­ecules are connected by N—H...O, O—H...N, N—H...S and O—H...S hydrogen bonds, forming a three-dimensional network.