| http://www.w3.org/ns/prov#value | - n with an acid or a base to obtain a support of formula I in which x=1, and optionally repeating the procedure successively in this fashion passing via intermediate supports of the formula ##STR42## wherein R, ???P , m and x1 have the above definitions and x is an integer from 0 to 20 until a support of formula I wherein x is 20 is obtained.
|
