10-hydroxy-1-acetoxy-8,9-(di-tert-butylsilylenedioxy)-1(R*),4,4a(S*),9(R*),9a(S*),10(S*)-hexahydroanthracene

1,2-Bis(2-bromobenzoyl)benzene

3,3-bis-(methoxycarbonyl)-5,10-dioxo-3,4,5,10-tetrahydro-1H-naphtho-[2,3-c]-pyran