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540744-18-1

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540744-18-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 540744-18-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 5,4,0,7,4 and 4 respectively; the second part has 2 digits, 1 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 540744-18:
(8*5)+(7*4)+(6*0)+(5*7)+(4*4)+(3*4)+(2*1)+(1*8)=141
141 % 10 = 1
So 540744-18-1 is a valid CAS Registry Number.

540744-18-1Relevant articles and documents

The macrocyclic spermidine alkaloid (-)-(S)-neoperiphylline: Revision of the structure based on the total synthesis

Sergeyev, Sergey A.,Hesse, Manfred

, p. 465 - 473 (2007/10/03)

The total synthesis of the two isomeric macrocyclic enamides 2 and 17 is described. The precursor 14 was synthesized by means of template-assisted macrocyclization (Scheme 2). Isomerization of 14 in the presence of [Fe(CO)5] gave 2 and 17 (Sche

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