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4996-33-2

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4996-33-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 4996-33-2 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 4,9,9 and 6 respectively; the second part has 2 digits, 3 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 4996-33:
(6*4)+(5*9)+(4*9)+(3*6)+(2*3)+(1*3)=132
132 % 10 = 2
So 4996-33-2 is a valid CAS Registry Number.

4996-33-2Relevant articles and documents

Synthesis and structure-activity relationships of vasicine analogues as bronchodilatory agents

Mahindroo, Neeraj,Ahmed, Zabeer,Bhagat, Asha,Bedi, Kasturi Lal,Khajuria, Ravi Kant,Kapoor, Vijay Kumar,Dhar, Kanaya Lal

, p. 347 - 368 (2007/10/03)

The series of vasicine (1) analogues, an alkaloid from Adhatoda vasica Nees., were synthesized with changes in A, B or C rings. Compounds 3-19 were evaluated for in vitro bronchodilatory activity using isolated guinea pig tracheal chain. Compounds 3-8 were also synthesized in good yields using microwave-mediated synthesis under solvent free conditions. Compounds 5 and 8 with seven-member C ring were more active than etofylline and caused 100% relaxation of both the histamine and acetylcholine pre-contracted guinea pig tracheal chain. The structure-activity relationship studies showed that the quinazoline and oxo functionalities were essential for activity. The compounds without C ring and instead having aliphatic and phenyl substitutions in B ring showed relaxation against histamine pre-contracted tracheal chain only, 2-methyl substituted analogues, 12 and 13, being most active with 100% relaxation effect. Birkhaeuser Boston 2006.

TRANSAMIDATION REACTIONS IN THE FORMATION OF MACROCYCLIC LACTAMS. A TOTAL SYNTHESIS OF CELLACINNINE.

Wasserman, Harry H.,Robinson, Ralph P.,Matsuyama, Haruo

, p. 3493 - 3496 (2007/10/02)

The macrocyclic spermidine alkaloid, cellacinnine, has been synthetized by methods involving successive ring expansion reactions.One route starts with 4-phenyl-2-azetidinone; another, with piperidazine.

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