New Advances in Chemical Research, May 2021. Reference of 19771-63-2, Chemical engineers ensure the efficiency and safety of chemical processes, adapt the chemical make-up of products to meet environmental or economic needs, and apply new technologies to improve existing processes. In a document type is Patent, and a compound is mentioned, 19771-63-2, (R)-2-Oxothiazolidine-4-carboxylic acid, introducing its new discovery.
Compounds of formula (I): STR1 wherein W represents a sulfur atom and X represents a group of formula –N(R1)–, or W represents a group of formula –N(R1)– and X represents a sulfur atom; R1 is hydrogen, alkyl or aralkyl; R2 and R3 are each hydrogen, alkyl, aralkyl, aryl or aromatic heterocyclic; R4 is hydrogen, alkyl or aralkyl; and A is alkylene which is optionally substituted by carboxy; and pharmaceutically acceptable salts and esters thereof, have a valuable vasodilatory activity.
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Reference：
Quinuclidine – Wikipedia,
Quinuclidine | C7H640N | ChemSpider