Chemistry is traditionally divided into organic and inorganic chemistry. HPLC of Formula: C8H4BrClN2, The former is the study of compounds containing at least one carbon-hydrogen bonds.In a patent，Which mentioned a new discovery about 89891-65-6
The present invention encompasses compounds of general formula (1) wherein the groups R1 to R4, Qa, Qb, QH, L and n are defined as in claim 1, which are suitable for the treatment of diseases characterised by excessive or abnormal cell proliferation, pharmaceutical preparations which contain such compounds and their use as medicaments.
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Reference：
Quinoxaline – Wikipedia,
Quinoxaline | C8H6N1951 | ChemSpider