@article{ref1,
title="Counting the chemicals",
journal="Nature",
year="2007",
author="Marris, Emma",
volume="447",
number="7144",
pages="516-517",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0028-0836",
doi="",
url="http://dx.doi.org/"
}