About: http://webisa.webdatacommons.org/141763366

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	R3 can be methyl, or related alkyls of preferably 2 to 20 carbons, or aryls such as phenyl, cycloalkyls, or vinyl or allyl groups or a CH2 ??? group, in general R3 can be the same as R2 ;
http://www.w3.org/ns/prov#wasQuotedFrom	google.com