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Dibutyl Squarate 2892 62 8 Structure

Dibutyl Squarate

Dibutyl squarate is a dialkyl ester of squaric acid, a strained four-membered cyclobutenedione system. The electron-deficient ring undergoes facile substitution with amines and other nucleophiles, making it a versatile electrophilic building block for pharmaceuticals, dyes, and bioconjugation chemistry.

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