CREATE TABLE table_51876 ("D 41" CLOB, "D 42" CLOB, "D 43" CLOB, "D 44" CLOB, "D 45" CLOB, "D 46" CLOB, "R 54" CLOB, "R 53" CLOB, "R 52" CLOB, "R 51" CLOB)

Name the D 41 which has a D 46 of r 6
SELECT "D 41" FROM table_51876 WHERE "D 46" = 'r 6'
SELECT "D 41" FROM "table_51876" WHERE "D 46" = 'r 6'