Showing structure for C=CC1=C(C)C2=CC3=NC(=C4C5=C(C(=O)C4C(=O)OC)C(C)=C(C=C4N=C(C=C1N2[Si](C)(C)C)C(C=O)=C4CC)N5[Si](C)(C)C)C(CCC(=O)O)C3C