prov:value
| - Accordingly, a suitably substituted compound of formula (X), a known compound or compound prepared by known methods, is reacted with a suitably substituted compound of formula (XI), a known compound or compound prepared by known methods, in the presence of a base such as sodium methoxide, sodium ethoxide, sodium t-butoxide, potassium methoxide, potassium t-butoxide, and the like, in an organic sol
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