About: http://webisa.webdatacommons.org/254871905

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	and A is hydroxy, hydrogen, or amino and B is hydrogen or hydroxy or R1 is a group of the formula
http://www.w3.org/ns/prov#wasQuotedFrom	google.com