About: http://webisa.webdatacommons.org/42843265

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	R2 is C1-C4alkyl, or R2 is CH2(OCH2CH2)nOCH3, in which n is a number 1 to 4,
http://www.w3.org/ns/prov#wasQuotedFrom	google.com