About: http://webisa.webdatacommons.org/328985735

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	Compounds of formula (3) where R3 is an alkyl group are prepared from compounds of formula (3) where R3 is hydrogen by standard methods such as alkylation using an appropriate alkyl halide in the presence of a suitable base such as NaH.
http://www.w3.org/ns/prov#wasQuotedFrom	google.es