(4R,7R)-N,N-diethyl-6-methyl-6,11-diazatetracyclo[7.6.1.0^{2,7}.0^{12,16}]hexadeca-1(16),2,9,12,14-pentaene-4-carboxamide
(4R,7R)-N,N-diethyl-6-methyl-6,11-diazatetracyclo[7.6.1.02,7.012,16]hexadeca-1(15),2,9,12(16),13-pentaene-4-carboxamide
(4R,7R)-N,N-diethyl-6-methyl-6,11-diazatetracyclo[7.6.1.02,7.012,16]hexadeca-1(16),2,9,12,14-pentaene-4-carboxamide