152697-41-1 Sch 49209 Sch-49209 Spiro(2a,6a-epoxynaphth(2,3-b)oxirene-2(1aH),2'-naphtho(1,8-de)(1,3)dioxin)-3,7(6H,7aH)-dione, 6-hydroxy-, (1aS-(1aalpha,2abeta,6alpha,6abeta,7aalpha))-