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![Poly[trimethylolpropane/di(propylene glycol)-alt-adipic acid/phthalic anhydride], polyol](https://api.sigmaaldrich.com/deepweb/assets/sigmaaldrich/product/structures/754/225/6e993d83-6b18-473b-a939-bb203d2680fa/640/6e993d83-6b18-473b-a939-bb203d2680fa.png)