  New superconductors, Li$_x$(C$_n$H$_{2n+3}$N)$_y$Fe$_{1-z}$Se ($n$ = 6, 8,
18), have been synthesized via the co-intercalation of linear monoamines
together with Li into FeSe. The distance between neighboring Fe layers expands
up to 55.7 {\AA} for n = 18, which is much larger than the previous record of
19 {\AA} in the FeSe-based intercalation superconductors. Tc remains saturated
at $\sim$42 K.
