[H]C1=C([H])C([H])=C2N(C3=C(SC2=C1[H])C([H])=C([H])C(SC([H])([H])[H])=C3[H])C([H])([H])C([H])([H])C1([H])NC([H])([H])C([H])([H])C([H])([H])C1([H])[H]