the method was used for preparation of guanosine diphosphate mannose analogs derived from adenine , purine , 2-aminopurine , 2-amino-6-methoxypurine , 2-amino-6-chloropurine , and 2-amino-6-mercaptopurine .
C0034140
purine
C0039902
2-amino-6-mercaptopurine