A short fragment of a copolyester chain (end groups shown) is drawn. On complete hydrolysis of all ester bonds, how many different organic compounds are obtained? Count distinct compounds only (not water, not repeated molecules). Give the answer as an integer.

Numerical answer type, tolerance 0.5.

Answer: 3

Cleaving the two ester bonds with RDKit gives terephthalic acid (from the ring unit), ethylene glycol and propane-1,2-diol. These are three different compounds, so the answer is 3.

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