12H-dibenzo[d,g][1,3]dioxocin-6-one, 2,4,8,10-tetrakis(1,1-dimethylethyl)- 2,4,8,10-tetra-tert-butyl-12H-dibenzo[d,g][1,3]dioxocin-6-one InChI=1/C30H42O3/c1-27(2,3)20-14-18-13-19-15-21(28(4,5)6)17-23(30(10,11)12)25(19)33-26(31)32-24(18)22(16-20)29(7,8)9/h14-17H,13H2,1-12H