About: http://webisa.webdatacommons.org/157836798

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	???NHNH???R4, ???NHN???C(CH3)2, ???(C???O)CH3, ???(C???O)H and ???ONHR4 wherein R4 is a protecting group; and
http://www.w3.org/ns/prov#wasQuotedFrom	google.com