12,16-Dioxatetracyclo[11.2.1.0^{2,11}.0^{3,8}]hexadeca-2(11),3(8),4,6,9-pentaene 10mg

12,16-Dioxatetracyclo[11.2.1.0^{2,11}.0^{3,8}]hexadeca-2(11),3(8),4,6,9-pentaene 10mg