56239-21-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 56239-21-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,6,2,3 and 9 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 56239-21:
(7*5)+(6*6)+(5*2)+(4*3)+(3*9)+(2*2)+(1*1)=125
125 % 10 = 5
So 56239-21-5 is a valid CAS Registry Number.
InChI:InChI=1/C21H21N5O6/c22-21-25-15-6-5-13(9-14(15)19(30)26-21)23-10-11-1-3-12(4-2-11)18(29)24-16(20(31)32)7-8-17(27)28/h1-6,9,16,23H,7-8,10H2,(H,24,29)(H,27,28)(H,31,32)(H3,22,25,26,30)/t16-/m0/s1
56239-21-5Relevant academic research and scientific papers
Improved Synthesis and Antitumor Evaluation of 5,8-Dideazaisofolic Acid and Closely Related Analogues
Hynes, J. B.,Yang, Y. C. S.,McGill, J. E.,Harmon, S. J.,Washtien, W. L.
, p. 232 - 235 (2007/10/02)
A new synthetic route to 5,8-dideazaisofolic acid (IAHQ) is described which precludes the possibility of contamination due to its 4-amino counterpart 5,8-dideazaisoaminopterin.Substitution of D-glutamic acid in this synthetic scheme gave D-IAHQ.The 9-form
