Chemistry is traditionally divided into organic and inorganic chemistry. HPLC of Formula: C10H7ClN2, The former is the study of compounds containing at least one carbon-hydrogen bonds.In a patent，Which mentioned a new discovery about 20375-65-9
Four isomers of the L-aspartyl-D-alanine fenchyl esters were prepared as potential peptide sweeteners. L-Aspartyl-D-alanine (+)-alpha-fenchyl ester and L-aspartyl-D-alanine (-)-beta-fenchyl ester showed sweetness with potencies 250 and 160 times higher than that of sucrose, respectively. In contrast, L-aspartyl-D-alanine (+)-beta-fenchyl ester and L-aspartyl-D-alanine (-)-alpha-fenchyl ester had the highest sweetness potencies at 5700 and 1100 times that of sucrose, respectively. In particular, L-aspartyl-D-alanine (-)-alpha-fenchyl ester had an excellent sweetness quality, but L-aspartyl-D-alanine (+)-beta-fenchyl ester did not have an excellent quality of sweetness because it displayed an aftertaste caused by the strong sweetness.
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Reference：
Pyridazine – Wikipedia,
Pyridazine | C4H4N2774 – PubChem