N-[(4E,6E,10S,12Z,14E)-6,10-dimethyl-3-oxohexadeca-4,6,12,14-tetraenoyl]-L-tyrosyl-[ACP] = (3E,5S)-3-[(2E,4E,8S,10E,12Z)-1-hydroxy-4,8-dimethyltetradeca-2,4,10,12-tetraen-1-ylidene]-5-[(4-hydroxyphenyl)methyl]pyrrolidine-2,4-dione + holo-[ACP] + H(+) — reaction