About: http://webisa.webdatacommons.org/453753089

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	Preferably, R4, R5, R6, R7, and R8 are independently H or aliphatic groups (preferably including up to 20 carbon atoms).
http://www.w3.org/ns/prov#wasQuotedFrom	google.co.uk