About: http://webisa.webdatacommons.org/366806421

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	In the general formula, X is a grouping of the general formula ##STR2## where R' is a divalent organic radical.
http://www.w3.org/ns/prov#wasQuotedFrom	google.es