Spermine  => N-acetylated spermine (Caenorhabditis elegans)
spermine  => n-acetylated spermine (caenorhabditis elegans)
Spermine  => N-acetylated spermine (Caenorhabditis elegans)
spermine  => n-acetylated spermine (caenorhabditis elegans)