2-amino-5-{[4-(4-amino-benzyl)-phenylamino]-methyl}-3,7-dihydro-pyrrolo[2,3-d]pyrimidin-4-one   、                                                                                      
4-[(2-amino-4-oxo-4,7-dihydro-3H-pyrrolo[2,3-d]pyrimidin-5-ylmethyl)-amino]-benzoic acid   、                                                                                      
N-(5-((dibenzylamino)methyl)-4-oxo-4,7-dihydro-3H-pyrrolo-[2,3-d]pyrimidin-2-yl)octanamide   、                                                                                      
4,4'-二氨基二苯甲烷                                                                                                                                                                                                                                                                                                          以to form octanoic acid (5-{[4-(4-amino-benzyl)-phenylamino]-methyl}-4-oxo-4,7-dihydro-3H-pyrrolo[2,3-d]pyrimidin-2-yl)-amide 23的产率得到octanoic acid (5-{[4-(4-amino-benzyl)-phenylamino]-methyl}-4-oxo-4,7-dihydro-3H-pyrrolo[2,3-d]pyrimidin-2-yl)-amide