user: Question: How many compound names list a chemical class of Depsipeptide and a clinical trials β value of 1/7?
Columns: ['Clinical Status', 'Compound Name', 'Trademark', 'Marine Organism α', 'Chemical Class', 'Molecular Target', 'Clinical Trials β', 'Disease Area']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['FDA-Approved', 'Cytarabine (Ara-C)', 'Cytosar-U ®', 'Sponge', 'Nucleoside', 'DNA Polymerase', '>50/711', 'Cancer']
SQL:

assistant: SELECT COUNT("Compound Name") FROM "Table" WHERE "Chemical Class" = 'Depsipeptide' AND "Clinical Trials β" = '1/7';