134888-93-0 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 134888-93-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,4,8,8 and 8 respectively; the second part has 2 digits, 9 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 134888-93:
(8*1)+(7*3)+(6*4)+(5*8)+(4*8)+(3*8)+(2*9)+(1*3)=170
170 % 10 = 0
So 134888-93-0 is a valid CAS Registry Number.
InChI:InChI=1/C13H9F3N2O4/c1-6-9(10(12(20)21)18-22-6)11(19)17-8-4-2-7(3-5-8)13(14,15)16/h2-5H,1H3,(H,17,19)(H,20,21)
134888-93-0Relevant articles and documents
3-Carboxy-5-methyl-N-[4-(trifluoromethyl)phenyl]-4-isoxazolecarboxamide, a new prodrug for the antiarthritic agent 2-cyano-3-hydroxy-N-[4- (trifluoromethyl)phenyl]-2-butenamide
Patterson,Cheung,Ernest
, p. 507 - 510 (2007/10/02)
The title compound 3-carboxyisoxazole 3 was synthesized by cycloaddition of carbethoxyformonitrile oxide to N-[4-(trifluoromethyl)phenyl]-3- pyrrolidino-2-butenamide (6) with spontaneous elimination of pyrrolidine followed by hydrolysis of the ethyl ester