[N-acetyl-alpha-D-neuraminosyl-(2->8)](n) + n acetyl-CoA = [O(7),N-diacetyl-alpha-D-neuraminosyl-(2->8)](n) + n CoA
[n-acetyl-alpha-d-neuraminosyl-(2->8)](n) + n acetyl-coa = [o(7),n-diacetyl-alpha-d-neuraminosyl-(2->8)](n) + n coa