1a,2,3,11c-Tetrahydrooxireno(5,6)benz(1,2-a)acridine-2,3-diol (1aalpha,2beta,3alpha,11calpha)- 81981-34-2 Oxireno(5,6)benz(1,2-a)acridine-2,3-diol, 1a,2,3,11c-tetrahydro-, (1aalpha,2beta,3alpha,11calpha)-