About: http://webisa.webdatacommons.org/449818259

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	wherein the dotted line represents a single or double bond and one R2 is a hydrogen atom and the other is a hydrogen atom or a methyl group;
http://www.w3.org/ns/prov#wasQuotedFrom	google.co.in