3-(2,4-dioxopentyl)-2,3,6,8,9-pentahydroxy-1-oxo-1,2,3,4-tetrahydroanthracene-2-carboxyl-[ACP] = 2-acetyl-3,4a,8,10,11,12a-hexahydroxy-1,4,4a,5,12,12a-hexahydrotetracene-1,12-dione + holo-[ACP] + H(+) — reaction