How many compound names list a chemical class of depsipeptide and a clinical trials value of 1/7?
CREATE TABLE table_12715053_1 (
    compound_name VARCHAR,
    chemical_class VARCHAR,
    clinical_trials_β VARCHAR
)
SELECT COUNT(compound_name) FROM table_12715053_1 WHERE chemical_class = "Depsipeptide" AND clinical_trials_β = "1/7"
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: How many compound names list a chemical class of depsipeptide and a clinical trials value of 1/7? ### Input: CREATE TABLE table_12715053_1 (
    compound_name VARCHAR,
    chemical_class VARCHAR,
    clinical_trials_β VARCHAR
) ### Response: SELECT COUNT(compound_name) FROM table_12715053_1 WHERE chemical_class = "Depsipeptide" AND clinical_trials_β = "1/7"