Showing structure for CC(C)(C)[Si](C)(C)NC1=NC2=C(C(=O)N1[Si](C)(C)C(C)(C)C)N1CN(C3=CC=C(C(=O)NC(CCC(=O)[O-])C(=O)[O-])C=C3)CC1CN2[Si](C)(C)C(C)(C)C