About: http://webisa.webdatacommons.org/143018223

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 particular, R2, R4 and R5 in formula (I) are hydrogen, and R1 and R3 are selected from the group consisting of halo, CH3, lower alkyl and lower alkoxy, e.g. halo and lower alkoxy, especially methoxy.
http://www.w3.org/ns/prov#wasQuotedFrom	freepatentsonline.com