About: http://webisa.webdatacommons.org/390432130

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	Preferred catalysts are compounds of Formulae III or IV or mixtures thereof wherein R is phenyl, R1, R2, R5, R6, R7 and R8 are hydrogen, R4 is methyl or chlorine especially methyl and X and Y are as hereinbefore defined.
http://www.w3.org/ns/prov#wasQuotedFrom	google.es