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