About: http://webisa.webdatacommons.org/63906896

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	Among them, a pyridine ring or a pyrazine ring is preferable and a pyridine ring is the most preferable. 1 to 3 of A, B, C and D is a nitrogen-containing heteroaromatic ring and the rest are benzene rings.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com