H4Y4D2R1O1C3A1R1B3O1N1S1
23 points
HYDROCARBONS is validvalid
HYDROCARBON,
HYDROCARBON, a compound of hydrogen and carbon with nothing else, occurring notably in oil, natural gas and coal
HYDROCARBON,
HYDROCARBON, a compound of hydrogen and carbon with nothing else, occurring notably in oil, natural gas and coal