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120090-80-4

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120090-80-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 120090-80-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,0,0,9 and 0 respectively; the second part has 2 digits, 8 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 120090-80:
(8*1)+(7*2)+(6*0)+(5*0)+(4*9)+(3*0)+(2*8)+(1*0)=74
74 % 10 = 4
So 120090-80-4 is a valid CAS Registry Number.

120090-80-4Upstream product

120090-80-4Downstream Products

120090-80-4Relevant articles and documents

Monomeric and dimeric stilbenoids from the orchid Dendrobium amplum

Majumder,Rahaman, Burhanur,Roychowdhury, Mausumi,Dhara

experimental part, p. 192 - 199 (2009/06/23)

Amplumthrin, a new dimeric 9,10-dihydrophenanthrene derivative, was isolated from the orchid Dendrobium amplum which also afforded the known 9,10-dihydrophenanthrene dimer flavanthrin and the monomeric stilbenoids gigantol, batatasin III, its 3′-O-methyl ether and 3,3′-O,O-dimethyl ether, 2,7-dihydroxy-3,4,6-trimethoxyphenanthrene and its 9,10-dihydro derivative, 2,3,7-trihydroxy-4,6-dimethoxyphenanthrene and its 9,10-dihydro derivative and coelonin. The structure of amplumthrin was established as 2,2′,7,7′-tetrahydroxy-3,3′,4,4′,6,6′-hexamethoxy- 9,9′,10,10′-tetrahydro-1,1′-biphenanthryl from various spectral and chemical evidence. The structure of amplumthrin was finally confirmed by regioselective biomimetic synthesis of the compound from its monomeric congener 2,7-dihydroxy-3,4,6-trimethoxy-9,10-dihydrophenanthrene by oxidative phenol-coupling reaction with CuCl(OH). TMEDA in very good yield (80%). Similar biomimetic synthesis of flavanthrin was also achieved in 82% yield from its monomeric congener coelonin using the same oxidant. The co-occurrence of amplumthrin and flavanthrin with their respective monomers in the same orchid Dendrobium amplum provides a strong circumstantial evidence in support of the proposed biogenesis of the naturally occurring biphenanthryl derivatives assumed to have arisen from their corresponding monomers through enzymatic oxidative phenol-coupling reaction.

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