@article{ref1,
title="Identification of oxymorphone as decomposition product of the permitted drug methylnaltrexone",
journal="Drug testing and analysis",
year="2018",
author="Sobolevsky, T. and Kucherova, Y. and Ahrens, B.",
volume="10",
number="5",
pages="892-895",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="1942-7603",
doi="10.1002/dta.2353",
url="http://dx.doi.org/10.1002/dta.2353"
}