About: http://webisa.webdatacommons.org/337007017

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	and wherein if each of R1, R2, R3 and R4 is an unsubstituted or uninterrupted alkyl, each of R1, R2, R3 and R4 is independently methyl or a C6-12 alkyl group;
http://www.w3.org/ns/prov#wasQuotedFrom	google.com