CC1C(C)C(=O)OC2C(OC(C)=O)C(OC(C)=O)C3(COC(C)=O)C(OC(C)=O)C(OC(=O)C4=CN=CC=C4)C4C(OC(C)=O)C3(OC4(C)COC(=O)C3=C1N=CC=C3)C2(C)O