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_64591 ( "Version" text, "Standard name" text, "Common name" text, "Downstream rate" text, "Upstream rate" text )

### Question ###
What's the standard name with an ADSL2 version and a 01.5 1.5 mbit/s downstream rate?

### Accurate SQL ###

SELECT "Standard name" FROM table_64591 WHERE "Version" = 'adsl2' AND "Downstream rate" = '01.5 1.5 mbit/s'