… ketone peroxides (whether or not chemically defined), and their halogenated, sulphonated, nitrated or nitrosated …
Explanatory notes
… WITH A THREE-MEMBERED RING, ACETALS AND HEMIACETALS, AND THEIR HALOGENATED, SULPHONATED, NITRATED OR NITROSATED … , ketone peroxides (whether or not chemically defined), and their halogenated, sulphonated, nitrated or nitrosated …