6WF 6wf 14-piperidin-1-yl-11-oxa-13$l^{3}-thia-15,16$l^{4}-diaza-12$l^{3}-ferratetracyclo[8.7.0.0^{2,7}.0^{12,16}]heptadeca-1(10),2(7),3,5,8,13,16-heptaene 6WF