About: http://webisa.webdatacommons.org/270825892

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	More specifically, R1 is a hydrogen atom, a saturated hydrocarbon group-such as alkyl or cycloalkyl, an unsaturated hydrocarbon group such as vinyl or alkenyl, or a silicon-containing hydrocarbon group such as alkylsilyl.
http://www.w3.org/ns/prov#wasQuotedFrom	google.es