21800-49-7 Usage
Hazard
A poison.
Check Digit Verification of cas no
The CAS Registry Mumber 21800-49-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,8,0 and 0 respectively; the second part has 2 digits, 4 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 21800-49:
(7*2)+(6*1)+(5*8)+(4*0)+(3*0)+(2*4)+(1*9)=77
77 % 10 = 7
So 21800-49-7 is a valid CAS Registry Number.
InChI:InChI=1/C24H28O5/c1-16-5-4-6-17(2)13-14-24(3,23(26)27)21(11-7-16)28-19-10-8-18-9-12-22(25)29-20(18)15-19/h5,8-10,12,15,21H,2,4,6-7,11,13-14H2,1,3H3,(H,26,27)/b16-5-
21800-49-7Relevant articles and documents
TOTAL SYNTHESIS OF (+/-)-KARATAVIC ACID: STRUCTURE CONFIRMATION OF THE FIRST SECO-DRIMANE TYPE SESQUITERPENOID
Nishizawa, Mugio,Takenaka, Hideyuki,Hayashi, Yuji
, p. 437 - 440 (2007/10/02)
One of the postulated structures of karavatic acid is confirmed via the total synthesis by means of the mercury(II) triflate/amine complex-induced olefin cyclization and subsequent short step transformations.Stereochemistry of this new class of natural pr