Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_21692771_1 (isin VARCHAR, amount_issued_ VARCHAR, € VARCHAR)

### Question ###
What is the ISIN that has an amount issued of 223,000,000?

### Accurate SQL ###

SELECT isin FROM table_21692771_1 WHERE amount_issued_[€] = "223,000,000"