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2-Ethylamino-1-phenylbutane (EAPB) and 2-amino-1-phenylbutane (APB) were identified by gas chromatography-mass spectrometry in multiple urine samples submitted for stimulant drug testing and screened positive for amphetamines by enzyme immunoassay. Forty-two samples from all over the USA were found, containing both analytes during a 3-month period May-July(More)
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