👉 It's a benzopyran-3-carbon ether with 1557 methyl group and 2 oxo groups, with its chemical name being ethyl 7-hydroxy 2-benzopyranone (S-Ethyl-7-hydroxy-2-benzopyranone). 1557. S-Ethyl 7-hydroxy-2-oxo-2H-1-benzopyran-3-carbothioate; 674819-25-1