Intermediate of Decitabine

Ⅰ.
[Chemical Name]:
1,3,5-Triazin-2(1H)-one, 4-amino-1-(3,5-di-O-acetyl-2-deoxy-b-D-erythro-pentofuranosyl)-
1,3,5-Triazin-2(1H)-one, 4-amino-1-(3,5-di-O-acetyl-2-deoxy-a-D-erythro-pentofuranosyl)-

[CAS NO.]: 1041672-46-1(a)   1254186-96-3(b)
[Structure] : a  +  b
 + 

Ⅱ.
[Chemical Name]: D-erythro-Pentofuranoside, methyl 2-deoxy-, diacetate (9CI)
[CAS NO.]: 151767-35-0
[Structure] :