2-(R)-[1-(S)-(3,5-Bis(trifluoromethyl)phenyl)ethoxy]-3-(S)-fluorophenylmorpholine-d2

2-(R)-[1-(S)-(3,5-Bis(trifluoromethyl)phenyl)ethoxy]-3-(S)-fluorophenylmorpholine-d2, also known as (S,R)-TFMPP-FMP-d2, is a deuterated derivative of TFMPP-FMP, which is a potent and selective serotonin receptor agonist. This compound is used in biochemical and pharmacological research to study the structure-activity relationship of serotonin receptors and their agonists. The chemical structure of (S,R)-TFMPP-FMP-d2 consists of a morpholine ring with a fluorine atom and a phenyl ring with two trifluoromethyl groups and an ethoxy group attached to it. The deuterium atom in the molecule is incorporated at the methylene position of the morpholine ring. The stereochemistry of the molecule is designated as (S,R) based on the configuration of the chiral centers in the ethoxy and fluorophenyl substituents. This compound is typically used as a labeled internal standard in mass spectrometry-based assays to quantify the levels of TFMPP-FMP in biological samples. The incorporation of deuterium in the molecule increases its mass and allows for accurate quantification of the compound in complex biological matrices. In summary, (S,R)-TFMPP-FMP-d2 is a deuterated derivative of a potent serotonin receptor agonist that is used in biochemical and pharmacological research as a labeled internal standard for mass spectrometry-based assays.