33302-55-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 33302-55-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,3,3,0 and 2 respectively; the second part has 2 digits, 5 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 33302-55:
(7*3)+(6*3)+(5*3)+(4*0)+(3*2)+(2*5)+(1*5)=75
75 % 10 = 5
So 33302-55-5 is a valid CAS Registry Number.
InChI:InChI=1/C57H85N9O9/c1-11-37(10)48-55(73)61-40(28-33(2)3)49(67)62-44(30-35(6)7)56(74)66-27-19-25-46(66)57(75)65-26-18-24-45(65)53(71)60-43(32-39-22-16-13-17-23-39)51(69)59-42(31-38-20-14-12-15-21-38)50(68)58-41(29-34(4)5)52(70)63-47(36(8)9)54(72)64-48/h12-17,20-23,33-37,40-48H,11,18-19,24-32H2,1-10H3,(H,58,68)(H,59,69)(H,60,71)(H,61,73)(H,62,67)(H,63,70)(H,64,72)/t37-,40+,41-,42+,43-,44-,45-,46?,47-,48-/m0/s1
33302-55-5Relevant articles and documents
A New Example of Edge-to-Face Interaction of Aromatic Rings in Oligopeptides: Cyclolinopeptide A
Siemion, Ignacy Z.
, p. 1324 - 1326 (2007/10/02)
The analysis of the aromatic region of 1H and 13C NMR spectra of cyclolinopeptide A (cyclic nonapeptide with the sequence c-(Pro-Pro-Phe-Phe-Leu-Ile-Ile-Leu-Val-), (CLA)) shows that Phe-3 and Phe-4 aromatic rings are oriented nearly perpendicularly to each other, forming edge-to-face pair.It signifies the strong limitation of the free rotation of aromatic residues, probably because of the steric hindrance exerted by proximal aliphatic side chains of CLA.
