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[1]Torosyan,G.O.;Akopyan,A.A.;Torosyan,A.T.;Babayan,A.T.[ChemistryofHeterocyclicCompounds,1990,vol.26,#4,p.390-392][KhimiyaGeterotsiklicheskikhSoedinenii,1990,#4,p.457-495]
[1]CurrentPatentAssignee:SCHLUMBERGERN.V.-US2009/126932,2009,A1