Spermidine  => N-acetylated spermidine (Caenorhabditis elegans)
spermidine  => n-acetylated spermidine (caenorhabditis elegans)
Spermidine  => N-acetylated spermidine (Caenorhabditis elegans)
spermidine  => n-acetylated spermidine (caenorhabditis elegans)