... > chemical entity > group > anionic group > organic anionic group > anionic amino-acid residue > O-(S-acylpantetheine-4'-phosphoryl)serine(1-) residue > O-[S-(2E)-2-enoylpantetheine-4'-phosphoryl]-L-serine(1-) residue > O-{S-(2S,4S)-2-azaniumyl-4-[(3S)-7,8-dihydroxy-1,2,3,4-tetrahydroisoquinolin-3-yl]-4-hydroxybutanoylpantetheine-4'-phosphoryl}serine(1+) residue