66640-98-0 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 66640-98-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,6,6,4 and 0 respectively; the second part has 2 digits, 9 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 66640-98:
(7*6)+(6*6)+(5*6)+(4*4)+(3*0)+(2*9)+(1*8)=150
150 % 10 = 0
So 66640-98-0 is a valid CAS Registry Number.
InChI:InChI=1/C20H23NO4/c1-3-16(23)24-15-7-5-12-13-10-11-4-6-14(22)18-17(11)20(12,19(15)25-18)8-9-21(13)2/h4-7,12-13,15,19,22H,3,8-10H2,1-2H3/t12-,13?,15-,19-,20-/m0/s1
66640-98-0Relevant academic research and scientific papers
Sy,By,Neville,Wilson
, p. 787 - 789 (1986)
3-O-Propanoylmorphine was obtained using the conditions reported earlier for the specific synthesis of 6-O-propanoylmorphine. The latter isomer was synthesized using two different methods; the two compounds were authenticated using IR, MS, carbon-13 and proton NMR.
