酞嗪又称苯并-正二嗪或苯并哒嗪，是一种分子式为C8H6N2的杂环有机化合物。它与其他萘啶类异构体，包括喹喔啉、辛可林和喹唑啉等。
3-Methyl-4-thioxo-3,4-dihydrophthalazine-1-carboxylic acid
Phthalazine-1-carboxylic acid
1-Chloro-4-(4-methylthiophen-2-yl)phthalazine
2-Benzyl-4-(5-mercapto-1,3,4-oxadiazol-2-yl)phthalazin-1(2H)-one
1,2,3,4-Tetrahydrophthalazine
1-Chlorophthalazine hydrochloride
2-(3-Ethyl-4-oxo-3,4-dihydrophthalazin-1-yl)propanoic acid
Sodium 5-amino-1,4-dioxo-3,4-dihydro-1H-phthalazin-2-ide hydrate(2:2:1)
4-(4-Methylthiophen-2-yl)phthalazin-1(2H)-one
4-(4-Fluorophenyl)phthalazin-1(2H)-one
4-(4-Methyl-1-oxophthalazin-2(1H)-yl)benzoic acid
3-(4-Methyl-1-oxophthalazin-2(1H)-yl)benzoic acid
Methyl 3-methyl-4-oxo-3,4-dihydrophthalazine-1-carboxylate
2-(3-(2-Hydroxyethyl)-4-oxo-3,4-dihydrophthalazin-1-yl)acetic acid
(E)-1-Hydrazineylidene-1,2-dihydrophthalazine
N1-(4-Methylphthalazin-1-yl)-N2-(pyridin-2-yl)ethane-1,2-diamine
4-Oxo-3-(3-(trifluoromethyl)phenyl)-3,4-dihydrophthalazine-1-carboxylic acid
1,4-Dichloro-5-methylphthalazine
4-(3-Bromo-4-fluorobenzyl)phthalazin-1(2H)-one
