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
A new reagent, 3-azaspiro[5,5]undecan-2,4-dioxo-3-yl diphenyl phosphate (ASUD-diphenyl phosphate) is described for the synthesis of N-protected amino acid-ASUD esters which are active esters useful in the synthesis of peptides. This compound was synthesized by reacting N-hydroxy-3-azaspiro[5,5]undecane-2,4-dione (HO-ASUD) with diphenyl chlorophosphate in the presence of a base at room temperature and was obtained in high yields. The ASUD-diphenyl phosphate reagent reacts with N-protected amino acids under mild conditions to give the corresponding ASUD active esters, while preserving the enantiomeric purity of the amino acid. The new reagent is a stable crystalline compound and eliminates the need for DCC, a potent skin allergen, used previously for the synthesis of N-protected amino acid-ASUD ester.
If you are interested in 20375-65-9, you can contact me at any time and look forward to more communication. HPLC of Formula: C10H7ClN2
Reference：
Pyridazine – Wikipedia,
Pyridazine | C4H4N2724 – PubChem