Diethyl cyanophosphonate → (2-{4-[(2,4-Diamino-pteridin-6-ylmethyl)-methyl-amino]-benzoylamino}-propyl)-phosphonic acid diethyl ester

Reaction equation

O.O.Cl.[NH2:4][C:5]1[N:14]=[C:13]([NH2:15])[C:12]2[C:7](=[N:8][CH:9]=[C:10]([CH2:16][N:17]([CH3:27])[C:18]3[CH:26]=[CH:25][C:21]([C:22]([OH:24])=O)=[CH:20][CH:19]=3)[N:11]=2)[N:6]=1.NC1N=C(N)C2C(=NC=C(C[N:41]([C:43]3[CH:51]=CC(C(O)=O)=C[CH:44]=3)C)N=2)N=1.O.O.C([P:56](=[O:63])([O:60][CH2:61][CH3:62])[O:57][CH2:58][CH3:59])#N.CCN(C(C)C)C(C)C.C(O)(=O)C(O)=O.C(OP(CCCN)(=O)OCC)C>CN(C=O)C>[CH2:58]([O:57][P:56]([CH2:51][CH:43]([NH:41][C:22](=[O:24])[C:21]1[CH:20]=[CH:19][C:18]([N:17]([CH2:16][C:10]2[N:11]=[C:12]3[C:7](=[N:8][CH:9]=2)[N:6]=[C:5]([NH2:4])[N:14]=[C:13]3[NH2:15])[CH3:27])=[CH:26][CH:25]=1)[CH3:44])(=[O:63])[O:60][CH2:61][CH3:62])[CH3:59]