About: precursor chemical

Premodifier: precursor
Head noun: chemical

Same concepts
http://dbpedia.org/resource/Precursor_(chemistry)

Broader concepts

label	provenance	confidence
material	isap:60089843	0.582206
substance	isap:186515479	0.453987
drug	isap:382126481	0.350517

Narrower concepts

label	provenance	confidence
acetic anhydride	isap:410504011	0.750781
hydrogen peroxide	isap:57223341	0.747075
ephedrine	isap:409351660	0.583490
pseudoephedrine	isap:141453071	0.459602
acetone	isap:50595790	0.424407