A two-compartment, first-order absorption product with linear elimination greatest explained the tramadol concentration details Flipping the path with the R2 and R1 bonds ends in the R- and S- enantiomers of O-Desmethyltramadol. O-DMST is almost identical to tramadol, and is also named for The dearth with the methyl group https://hemalchem.com/product/o-dsmt/