About: http://webisa.webdatacommons.org/257894764

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	X is selected from a direct bond, ???C(R6,R14)???Y??? and ???C(R13)???CH???, with the proviso that when X is a direct bond and A is formula (III) then at least one of R7, R8 and R9 is not hydrogen;
http://www.w3.org/ns/prov#wasQuotedFrom	google.com