2,4-Diiodo-3-nitro­anisole

In the title compound (systematic name: 1,3-diiodo-4-meth­oxy-2-nitro­benzene), C₇H₅I₂NO₃, the dihedral angle between the benzene ring and the nitro group is 88.0 (3)°, and the methyl group lies almost in the same plane as the ring [deviation = 0.034 (6) Å]. In the crystal, aromatic π–π stacking occurs between inversion-related rings [centroid–centroid separation = 3.865 (3) Å and slippage = 0.642 Å]. A possible weak C—I...π inter­action occurs [I...π = 3.701 (2) Å and C—I...π = 130.18 (13)°], but there are no significant inter­molecular I...I contacts.

Dihydro­cryptopine

In the crystal structure of the title compound [systematic name: 6,7-dimeth­oxy-12-methyl-16,18-dioxa-12-aza­tetra­cyclo­[12.7.0.0^4,9.0^15,19]henicosa-1(21),4,6,8,14,19-hexaen-3-ol], C₂₁H₂₅NO₅, the benzene rings exhibits a dihedral angle of 14.95 (4)°. In the crystal, mol­ecules are linked by pairs of O—H...O hydrogen bonding into inversion dimers. These dimers are further connected by C—H...O inter­actions.