About: http://webisa.webdatacommons.org/10645586

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 and R2 are alkyl groups having 1 to 3 carbon atoms, inclusive, and more particularly are methyl groups;
http://www.w3.org/ns/prov#wasQuotedFrom	google.es