1,1,3,3-tetramethyl-2-indanone triphenyl-phosphoranylidenehydrazone

1,1'',3,3''-Tetrahydro-1,1,1'',1'',3,3,3'',3''-octamethyldispiro[2H-inden-2,2'-[1,3,4]selenadiazol-5',2''-[2H]inden]