| http://www.w3.org/ns/prov#value | - Agent: Takeda Pharmaceutical Company Limted20110172250 - Isotopically enriched pyrimidin-5-yl acetic acid derivatives as crth2 antagonists: Provided herein are 2H- and 13C-enriched compounds of formula (I) or (II); wherein R is as defined herein, and wherein at least one hydrogen atom, in certain embodiments, three or more hydrogen atoms, are deuterium atoms or at least one carbon atom is a carbon
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