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54911-11-4

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54911-11-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 54911-11-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,4,9,1 and 1 respectively; the second part has 2 digits, 1 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 54911-11:
(7*5)+(6*4)+(5*9)+(4*1)+(3*1)+(2*1)+(1*1)=114
114 % 10 = 4
So 54911-11-4 is a valid CAS Registry Number.

54911-11-4Relevant articles and documents

Dammarane Triterpenes of Trevoa trinervis: Structure and Absolute Stereochemistry of Trevoagenins A, B, and C

Betancor, Carmen,Freire, Raimundo,Hernandez, Rosendo,Suarez, Ernesto,Cortes, Manuel,et al.

, p. 1119 - 1126 (2007/10/02)

Trevoagenins A, B, and C, extracted from Trevoa trinervis Miers, are shown, by chemical and spectral means, to be isomeric dammarane triterpenes posessing the general 3β,25,30-trihydroxy-(20,24)-epoxydammaran-16-one structure with stereoisomeric side-chains of the ocotillol type.Trevoagenin A (20R,24R)-(1),, whose stereochemistry has been esteblished by chemical methods and confirmed by X-ray analysis, was transformed into (20R,24ξ)-ocotillone (26) and the C-24 stereochemistry was assigned as R.As a consequence, the C-24 stereochemistry for ocotillol-related compounds of the (20R)-series, unestablished so far, has been determined.The stereochemistry of trevoagenin B, (20S,24R)-(13), was established by chemical correlation with trevoagenin A.Moreover, trevoagenin B was transformed into ocotillol (20S,24R)-(21) and its recently questioned C-24 stereochemistry has been reaffirmed.Trevoagenin C, (20S,24S)-(17), is the C-24 isomer of trevoagenin B as shown by degradation of both compounds to the lactone (16).

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