193890-20-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 193890-20-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,3,8,9 and 0 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 193890-20:
(8*1)+(7*9)+(6*3)+(5*8)+(4*9)+(3*0)+(2*2)+(1*0)=169
169 % 10 = 9
So 193890-20-9 is a valid CAS Registry Number.
193890-20-9Relevant academic research and scientific papers
An alternative efficient synthesis of the C20-C25 building unit for calyculin A
Kabeya, Mototsugu,Hamada, Yasumasa,Shioiri, Takayuki
, p. 9777 - 9788 (2007/10/03)
We have explored the efficient synthetic route to the C20-C25 building unit 3 for calyculin A (1) starting from the chiral γ-lactone 5 using the Wittig reaction, followed by hydroboration as the key steps.
