Chemistry is traditionally divided into organic and inorganic chemistry. COA of Formula: C9H7NO, The former is the study of compounds containing at least one carbon-hydrogen bonds.In a patent，Which mentioned a new discovery about 1532-72-5
Reactions of quinoline N-oxides (1) with barbituric acid in Ac2O (1.2 eq) – DMF afford regioselectively 2-substituted quinolines (3) or quinolinium ylides (4), depending upon the nature of 1 and the reaction conditions.The reactions of quinoline and lepidine N-oxides (1a, 1b) at room temperature give the N-ylides (4a, 4b), and those at 90 deg yield 2-substituted quinolines (3a, 3b).The directive effect of the reaction temperature is very reverse in reactions of 4-methoxy- and 4-chloro-quinoline N-oxides (1c, 1d); nevertheless, the reactions in Ac2O at 90 deg afford 3cand 3d.While 3-cyanoquinoline N-oxide (1g) gives only 2-substituted product (3g), 4-morpholino-, 3-bromo- and 3-acetamido-quinoline N-oxides (1e, 1f, 1h) afford N-ylides (4e, 4f, 4h), independently of the reaction conditions.
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Reference：
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem