<n0:ComplexDefinition xmlns:n0="http://ncicb.nci.nih.gov/xml/owl/EVS/ComplexProperties.xsd#"><n0:def-definition>Having to do with substances that are man-made instead of taken from nature.</n0:def-definition><n0:def-source>NCI-GLOSS</n0:def-source></n0:ComplexDefinition>
<n0:ComplexDefinition xmlns:n0="http://ncicb.nci.nih.gov/xml/owl/EVS/ComplexProperties.xsd#"><n0:def-definition>The process of producing a chemical compound, usually by the union of simpler chemical compounds.</n0:def-definition><n0:def-source>NCI</n0:def-source></n0:ComplexDefinition>