About: http://webisa.webdatacommons.org/430447656

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	is a hydrogen atom or a C1 -C4 alkyl group; R4 and R5 are independently a C1 -C4 alkyl group which may be substituted with a hydroxyl group, a halogen atom, a cyano group or a C1 -C4 alkoxy group; and a is an integer of 1 to 3;
http://www.w3.org/ns/prov#wasQuotedFrom	google.com