About: http://webisa.webdatacommons.org/326068765

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	R1 is not particularly limited, but preferably an atom or an atomic group other than carbon, such as O, NH, or S, in view of synthesis.
http://www.w3.org/ns/prov#wasQuotedFrom	google.fr