<http://webisa.webdatacommons.org/16665592> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/ns/prov#Entity> . <http://webisa.webdatacommons.org/16665592> <http://www.w3.org/ns/prov#wasQuotedFrom> <google.com> . <http://webisa.webdatacommons.org/prov/516234944> <http://www.w3.org/ns/prov#wasDerivedFrom> <http://webisa.webdatacommons.org/16665592> . <http://webisa.webdatacommons.org/16665592> <http://www.w3.org/ns/prov#value> "yl, nitro, cyano, and amino groups; or L is selected from the group consisting of the formula ???(CH2)kQ(CH2)t??? where k is 1, 2 or 3, t is 1, 2 or 3 and Q is O, Se, Se(O)g, SiE2 where E is lower alkyl, aryl, S(O)g where g is 0, 1 or 2, or NR; or L is selected from the group consisting of the formula ???(CH2)mT(CH2)n??? where m is 0, 1 or 2, n is 0, 1 or 2, T is a 3 to 6 membered carbocyclic or h" .