About: http://webisa.webdatacommons.org/76515537

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	In the case where formaldehyde is used, the reaction is preferably carried out in water-miscible solvents, such as dioxane or tetrahydrofuran, using phosphorous acid or salts thereof as the reducing agent.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com