... > chemical entity > group > anionic group > organic anionic group > anionic amino-acid residue > O-(S-acylpantetheine-4'-phosphoryl)serine(1-) residue > O-(S-3-oxoacylpantetheine-4'-phosphoryl)-L-serine(1-) residue > O-{S-[(21Z,37Z)-3-oxohexapentacontadienoylpantetheine]-4'-phosphoryl}-L-serine(1-) residue