| http://www.w3.org/ns/prov#value | - nts S; Z is H, a protecting group or an H-phosphonate group of formula in which M+ is a monovalent cation; and n is an integer; provided that when W is H or a protecting group, that Z is a positive H-phosphonate group, and that when Z is H or a protecting group, that W is an H-phosphonate group. 9.
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