159344-43-1

Spiro[2a,6a-epoxynaphth[2,3-b]oxirene-2(1aH),2'-naphtho[1,8-de][1,3]dioxin]-3,6-dione,7,7a-dihydro-7-hydroxy-7-methoxy-, (1aa,2ab,6ab,7a,7aa)-(-)-