Showing structure for CC(C)(C)[Si](C)(C)OC(=O)C1=C(N([Si](C)(C)C(C)(C)C)[Si](C)(C)C(C)(C)C)C(=O)C=C2OC3=CC=CC(C(=O)O[Si](C)(C)C(C)(C)C)=C3N=C21