117707-09-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 117707-09-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,7,7,0 and 7 respectively; the second part has 2 digits, 0 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 117707-09:
(8*1)+(7*1)+(6*7)+(5*7)+(4*0)+(3*7)+(2*0)+(1*9)=122
122 % 10 = 2
So 117707-09-2 is a valid CAS Registry Number.
117707-09-2Relevant articles and documents
Synthesis of the Furanoheliangolide Ring Skeleton
McDougal, Patrick G.,Oh, Young-Im,VanDerveer, Don
, p. 91 - 97 (2007/10/02)
A synthesis of the 11-oxabicycloundecane ring system found in the furanoheliangolide and abestinane classes of natural products is described.The key reaction involves the ozonolysis of an oxa-bridged Δ9-octalin (28) to yield an oxa-bridg
