Spermine  => N-acetylated spermine (Dictyostelium discoideum)
spermine  => n-acetylated spermine (dictyostelium discoideum)
Spermine  => N-acetylated spermine (Dictyostelium discoideum)
spermine  => n-acetylated spermine (dictyostelium discoideum)