About: http://webisa.webdatacommons.org/163317458

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 formula 2, it is preferred that all of R1, R2 and R3 are a methyl group.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com