About: http://webisa.webdatacommons.org/273439499

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	when x is equal to 1, R3is a hydrogen atom and R4 is a hydrogen atom and R4 is a negatively charged oxygen atom, the method is in this case the so-called H-phosphonate method, and
http://www.w3.org/ns/prov#wasQuotedFrom	google.com.au