butyl 3-phenylprop-2-ynoate

2-tert-butylperoxy-2-hydroxy-1-phenylethanone

2-methyl-1-oxy-2-phenyl-2H-indole-3,7-dione

2-methyl-1-oxido-2-phenylindol-1-ium-3,5-dione

5-(tert-butoxy)-2-methyl-3,7-dioxo-2-phenyl-3,7-dihydro-2H-indole 1-oxide