Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
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 β value of 1/7?
### Answer:
SELECT COUNT(compound_name) FROM table_12715053_1 WHERE chemical_class = "Depsipeptide" AND clinical_trials_β = "1/7"