phthalazine

Noun

 * 1)  A bicyclic heterocycle consisting of a benzene ring fused to pyridazine

Derived terms

 * chlorphthalazine

Translations

 * Chinese:
 * Cantonese: 酞嗪
 * Mandarin: 酞嗪
 * Italian:
 * Japanese: フタラジン
 * Korean: 프탈라진