Assertion: hydrocarbon's benzene ring | /r/HasProperty | fused to pyrene
Facets:
Source sentences:
text: The substance with the formula C 20 H 12 is one of the benzopyrenes, formed by a benzene ring fused to pyrene.
text: The compound is one of the benzopyrenes, formed by a benzene ring fused to pyrene, and is the result of incomplete combustion at temperatures between 300 °C (572 °F) and 600 °C (1,112 °F).