Oxime ethers of 2,6 dioxabicyclooctanones of the formula I, ##{TAIL ~ STR6}## in which R1 and {HEAD ~ R2} are the same or different and are selected from 
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Oxime ethers of 2,6 dioxabicyclooctanones of the formula I , # # { TAIL ~ STR6 } # # in which R1 and { HEAD ~ R2 } are the same or different and are selected from
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH REL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH