(R)-5,5-Dimethyl-3-(pyridin-3-ylsulfonyl)-thiazolidine-4-carboxylic acid (CAS No. 737799-50-7) is an advanced pharmaceutical intermediate primarily used in the synthesis of Vonoprazan, a potassium-competitive acid blocker (P-CAB) medication for acid-related gastrointestinal disorders. Purity>98%.