x1 = b_met
x2 = b_ser
x3 = GAR
x4 = NADPH
x5 = BET
x6 = DUMP
x7 = Fol
x8 = H2O2
x9 = CO
x10 = HCHO
x11 = c_thf
x12 = m_thf
x13 = c_5mf
x14 = c_2cf
x15 = c_1cf
x16 = c_10f
x17 = c_dhf
x18 = m_2cf
x19 = m_1cf
x20 = m_10f
x21 = b_gly
x22 = b_glu
x23 = b_cys
x24 = b_gsg
x25 = b_gsh
x26 = aic
x27 = c_glu
x28 = c_cys
x29 = glc
x30 = c_gly
x31 = c_gsg
x32 = c_gsh
x33 = cyt
x34 = hcy
x35 = c_ser
x36 = sah
x37 = sam
x38 = met
x39 = c_coo
x40 = m_ser
x41 = m_gly
x42 = m_coo
x43 = src
x44 = dmg