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Showing structure for CC(C)(C)[Si](C)(C)OC1=C(O)C=C(C(=O)OC2OC(CO)C(O[Si](C)(C)C(C)(C)C)C(O[Si](C)(C)C(C)(C)C)C2O[Si](C)(C)C(C)(C)C)C=C1O