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_12715053_1 ( compound_name VARCHAR, chemical_class VARCHAR, clinical_trials_β VARCHAR )

### Question ###
How many compound names list a chemical class of depsipeptide and a clinical trials value of 1/7?

### Accurate SQL ###

SELECT COUNT(compound_name) FROM table_12715053_1 WHERE chemical_class = "Depsipeptide" AND clinical_trials_β = "1/7"