About: http://webisa.webdatacommons.org/377864915

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	Optionally, at least one of R2, R3 and R4 is an alkyl group which is substituted with a primary, secondary or tertiary amine group or a quaternary ammonium group.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com