131816-89-2 2,6-Piperazinedione, 4-(((8beta)-9,10-didehydroergolin-8-yl)methyl)- 4-(((8beta)-9,10-Didehydroergolin-8-yl)methyl)-2,6-piperazinedione 4-(9,10-Didehydroergolin-8-yl)methylpiperazine-2,6-dione 6-Nor-fce-23884 Fce 26506 Fce-26506