2-[(4,6-Dimeth­oxy­pyrimidin-2-yl)­oxy]benzaldehyde

In the title compound, C₁₃H₁₂N₂O₄, the dihedral angle between the benzene and pyrimidine rings is 55.57 (13)°. The carbonyl group and the two methoxyl groups are approximately coplanar with the benzene ring and pyrimidine ring; the C—C—C—O, C—O—C—N and C—O—C—C torsion angles being −6.1 (5), −4.8 (4) and 179.9 (3)°, respectively. In the crystal, mol­ecules are linked via C—H...O inter­actions, forming chains propagating along [110].

2-(Hy­droxy­meth­yl)pyridin-3-ol

In the crystal structure of the title compound, C₆H₇NO₂, the mol­ecules are are linked by inter­molecular O—H...N and O—H...O hydrogen bonds; π–π stacking is observed between parallel pyridine rings of adjacent mol­ecules [centroid-to-centroid distance = 3.7649 (12) Å].

rac-Methyl 2-(2-formyl-4-nitro­phen­oxy)hexa­noate

In the racemic title compound, C₁₄H₁₇NO₆, the plane of the ester group of the methyl hexa­noate side chain makes a dihedral angle of 80.0 (2)° with the benzene ring, while the nitro group is approximately coplanar with the benzene ring [dihedral angle = 10.3 (2)°]. In the crystal, mol­ecules form weak aromatic C—H...O_nitro hydrogen-bonding inter­actions, giving inversion dimers [graph set R₂²(8)].