prov:value
| - ally in the presence of a base, with a compound of formula ##STR29## wherein n, R2, R5 and R7 are as defined for formula I, or reacting a compound of formula ##STR30## wherein n, X, R2, R3, R4, R5 and R7 are as defined for formula I, optionally in the presence of a base, with a compound of the formula X3 R9, wherein R9 is as defined for formula I and X3 is a leaving group, or b) for the preparatio
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