RESIDUE B7S 19 CONECT C10 3 C01 C09 O11 CONECT C01 3 C10 C02 H011 CONECT C02 3 C01 O03 H021 CONECT C04 3 C05 C09 O03 CONECT C05 3 C04 C06 H051 CONECT C06 3 C05 C07 O13 CONECT C07 3 C06 C08 H071 CONECT C08 3 C07 C09 O12 CONECT C09 3 C10 C04 C08 CONECT O03 2 C02 C04 CONECT O11 1 C10 CONECT O12 2 C08 H121 CONECT O13 2 C06 H131 CONECT H011 1 C01 CONECT H021 1 C02 CONECT H051 1 C05 CONECT H071 1 C07 CONECT H121 1 O12 CONECT H131 1 O13 END HET B7S 19 HETNAM B7S 5,7-dihydroxy-4H-1-benzopyran-4-one FORMUL B7S C9 H6 O4