x1 = ADP
x2 = NAD
x3 = ATP
x4 = NADH
x5 = pyruvate
x6 = lactate
x7 = CoA
x8 = halfglucose
x9 = AcCoA
x10 = AcP
x11 = Ac
x12 = AcO
x13 = EtOH
x14 = AcLac
x15 = AcetoinIn
x16 = AcetoinOut
x17 = Butanediol
x18 = O2
x19 = PO4