About: http://webisa.webdatacommons.org/204500609

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	Phosphate esters are also suitable, e.g. esters of the formula RO--(PO3 M)--n R, wherein n is as defined previously and R is an organic group or M (as defined previously), at least one R being an organic group such as oxyalkylene chain.
http://www.w3.org/ns/prov#wasQuotedFrom	google.co.uk