About: http://webisa.webdatacommons.org/117540876

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	The substituents R3 and R4 independently represent lower alkyl groups of 1-4 carbon atoms, e.g., ethyl, propyl, isopropyl, or especially methyl.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com