About: http://webisa.webdatacommons.org/251142724

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	Also preferred are those in which R3 is a hydrogen, methyl, ethyl or phenylmethyl group.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com