Li, Xie published the artcileResearch on synthesis of S-(-)-omeprazole sodium, HPLC of Formula: 161796-78-7, the publication is Huagong Shikan (2009), 23(2), 35-36, database is CAplus.
A method for the synthesis of the title compound [i.e., 6-methoxy-2-[(S)-[(4-methoxy-3,5-dimethyl-2-pyridinyl)methyl]sulfinyl]-1H-benzimidazole sodium salt (1:1)] is reported here. (-)-Omeprazole was prepared from 5-methoxy-2-[(4-methoxy-3,5-dimethyl-2-pyridinyl)methylthio]benzimidazole (i.e., a sulfide derivative) and cumene hydroperoxide by an asym. oxidation method. The product was treated with sodium hydroxide to give S-(-)-omeprazole sodium.
Huagong Shikan published new progress about 161796-78-7. 161796-78-7 belongs to imidazoles-derivatives, auxiliary class Membrane Transporter/Ion Channel,Proton Pump, name is Sodium (S)-6-methoxy-2-(((4-methoxy-3,5-dimethylpyridin-2-yl)methyl)sulfinyl)benzo[d]imidazol-1-ide, and the molecular formula is C17H18N3NaO3S, HPLC of Formula: 161796-78-7.
Referemce:
https://en.wikipedia.org/wiki/Imidazole,
Imidazole | C3H4N2 – PubChem