1056380 HQS 8-hydroxyquinoline-5-sulfonic acid 23 3749760 8-HQS 8-hydroxyquinoline-5-sulfonate 15 2781527 HQSA 8-hydroxyquinoline-5-sulfonic acid 5 1968956 8-HQSA 8-hydroxyquinoline-5-sulfonic acid 2 1056235 HQL 8-hydroxyquinoline-5-sulfonic acid 1