About: http://webisa.webdatacommons.org/27373399

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	Within another preferred group of molecules, X is Cn, NH or S; R1 is OH; R2 is COOR4; R3 is H or CH3 ; and R4 is H or lower alkyl, particularly methyl.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com