{ "items" : [
    { "id" : "http://webisa.webdatacommons.org/303022607"
      "properties" : {
        "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" : [ "The formula III starting material may be prepared by alkylating an anion derived from an alkyl or (substituted)aralkylalkoxyphosphinyl acetic acid, alkyl ester, that is ##STR100## by a primary halide derivative of R3 (e.g., R3 --Br) which contains suitable protection for the R3 group, in the presence of a base such as sodium hydride and an inert solvent such as tetrahydrofuran to form ##STR101## S" ] ,
        "http://www.w3.org/ns/prov#wasQuotedFrom" : [ "google.com" ] } },

    { "id" : "http://webisa.webdatacommons.org/prov/49424464"
      "properties" : {
        "http://www.w3.org/ns/prov#wasDerivedFrom" : [ "http://webisa.webdatacommons.org/303022607"] } } }
