CC(C)C1OC(=O)C(CC2=CC=CC=C2)N(C)C(=O)C(OC(=O)C(CC2=CC=CC=C2)N(C)C(=O)C(OC(=O)C(CC2=CC=CC=C2)N(C)C1=O)C(C)C)C(C)C