What is the current map designation of the feature for which derain crater was the namesake?
CREATE TABLE "schema_of_the_quadrangles" (
  "name" text,
  "number" text,
  "namesake" text,
  "albedo_feature_name" text,
  "area" text,
  "current_map" text
);
SELECT "current_map" FROM "schema_of_the_quadrangles" WHERE "namesake"='derain crater';