About: http://webisa.webdatacommons.org/11788538

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	wherein R3 is H or alkyl with 1 to 4 C atoms and X is a halogen atom, in the presence of a base to a compound of the formula: ##STR12## The preferred compound of formula III is carboxybutyl triphenylphosphonium bromide.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com