3-(p-Nitro­benzyl)-1,3-thia­zolidine-2,4-dione

The title compound, C₁₀H₈N₂O₄S, serves as a starting material for the synthesis of antihyperglycemic pharmaceuticals. The nearly planar thia­zolidine-2,4-dione ring is almost perpendic­ular to the nitro­phenyl ring.

5-Amino-3H-isobenzo­furan-1-one (5-amino­phthalide)

The title compound, C₈H₇NO₂, serves as an intermediate for the synthesis of citalopram. The packing of the planar mol­ecules is stabilized by N—H...O and N—H...N hydrogen bonds.