About: http://webisa.webdatacommons.org/443611068

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	The sulfonamides of Formula IVa are isolated either by filtration, in which case the ammonium chloride byproduct is removed by washing with water, or extraction into an organic solvent such as methylene chloride.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com