About: http://webisa.webdatacommons.org/16867529

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 repeating unit I represented by the general formula (I), R1 and R2 are, respectively, a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, such as methyl group, ethyl group, propyl group and butyl group.
http://www.w3.org/ns/prov#wasQuotedFrom	google.es