Spermidine  => N-acetylated spermidine (Dictyostelium discoideum)
spermidine  => n-acetylated spermidine (dictyostelium discoideum)
Spermidine  => N-acetylated spermidine (Dictyostelium discoideum)
spermidine  => n-acetylated spermidine (dictyostelium discoideum)