49751-17-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 49751-17-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 4,9,7,5 and 1 respectively; the second part has 2 digits, 1 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 49751-17:
(7*4)+(6*9)+(5*7)+(4*5)+(3*1)+(2*1)+(1*7)=149
149 % 10 = 9
So 49751-17-9 is a valid CAS Registry Number.
InChI:InChI=1/C17H18BrNO3/c1-19-5-4-17-9-2-3-12(20)16(17)22-15-13(21)7-10(18)8(14(15)17)6-11(9)19/h2-3,7,9,11-12,16,20-21H,4-6H2,1H3/t9-,11+,12-,16-,17-/m0/s1
49751-17-9Relevant articles and documents
Bromination products of morphine
Goerlitzer,Weltrowski,Wray,Schumann
, p. 655 - 657 (2007/10/03)
Morphine (1) reacts with an excess of bromine to yield 6-acetoxy-1,2- dibromomorphine (3), while in hydrobromic acid with bromine the isomeric 1,2,7 α,8β- and 1,2,7β,8α-tetrabromomorphines 4 and 5 are obtained. NMR data show that ring C exists as a chair conformation in 4 and has a boat conformation in 5.