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_name_49 (standard_name VARCHAR, version VARCHAR, downstream_rate VARCHAR)

### 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_name_49 WHERE version = "adsl2" AND downstream_rate = "01.5 1.5 mbit/s"