About: http://webisa.webdatacommons.org/93579679

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	mpounds represented by the general formula: ##STR2## where R is a hydrogen or a halogen atom and X is an oxygen atom, a carbonyl group, a methylene group, a sulfur atom, a disulfide group or a sulfone group.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com