CREATE TABLE table_203_613 (id NUMBER, "formula" CLOB, "color" CLOB, "symmetry" CLOB, "space group" CLOB, "no" NUMBER, "pearson symbol" CLOB, "a  ( pm ) " NUMBER, "b  ( pm ) " NUMBER, "c  ( pm ) " NUMBER, "z" NUMBER, "density ,  g/cm3" NUMBER)

what is the formula for the compound that has the same pearson symbol as pacl4 ?
SELECT "formula" FROM table_203_613 WHERE "formula" <> 'pacl4' AND "pearson symbol" = (SELECT "pearson symbol" FROM table_203_613 WHERE "formula" = 'pacl4')
SELECT "formula" FROM "table_203_613" WHERE "formula" <> 'pacl4' AND "pearson symbol" = (SELECT "pearson symbol" FROM "table_203_613" WHERE "formula" = 'pacl4')