Interspecies In Vitro Evaluation of Stereoselective Protein Binding for 3,4-Methylenedioxymethamphetamine

Table 1

Percentage of nonspecific binding of rac-MDMA to ultrafiltration devices.

Concentration of rac-MDMA (ng/mL)	Compound	Mean peak area ratios		Nonspecific binding (%)
		Sample ()	Control ()
20	(−)-(R)-MDMA		0.091	−2.3
	(+)-(S)-MDMA		0.095	−3.1
200	(−)-(R)-MDMA		0.884	−4.6
	(+)-(S)-MDMA		0.890	−5.6