(-)-5,6-Dihydro-1,6,7,9,11-pentahydroxy-3-pentylbenzo(a)naphthacene-8,13-dione 151013-38-6 Benzo(a)naphthacene-8,13-dione, 5,6-dihydro-1,6,7,9,11-pentahydroxy-3-pentyl-, (-)- Bequinostatin B