نتایج جستجو برای: 1 8 dioxo octahydroxanthene

تعداد نتایج: 3082950  

Journal: :Zeitschrift fur Naturforschung. C, Journal of biosciences 2004
Bahar Ahmed Tawfeq A Al-Howiriny Adnan J Al-Rehaily Jaber S Mossa

Two new diterpenes namely verbenacine (1) and salvinine (2) have been isolated from the aerial parts of Salvia verbenaca. Their structures have been elucidated on the basis of chemical and spectral data as 3alpha-hydroxy-19-carboxykaur-15-ene and 19-hydroxy-12,14-dioxo labda-15,17-diene.

Journal: :Acta Crystallographica Section E Structure Reports Online 2011

Journal: :iranian chemical communication 0
hojat veisi department of chemistry, payame noor university, po box 19395-4697 tehran, iran abbas maleki department of chemistry, payame noor university, po box 19395-4697 tehran, iran yasaman farokhzad department of chemistry, payame noor university, po box 19395-4697 tehran, iran

an electroorganic reaction for the synthesis of 7-amino-2, 4-dioxo-5-phenyl-2,3,4,5-tetrahydro-1h-pyrano[2, 3-d] pyrimidine-6-carbonitrile and ethyl-7-amino-2, 4-dioxo-5-phenyl-2,3,4,5-tetrahydro-1h-pyrano[2, 3-d] pyrimidine-6-carboxylate derivatives are described, using an electrogenerated base of the anion of malonitrile or ethylcyanoacetate. this one-pot, three-component condensation of an a...

Journal: :iranian journal of fuzzy systems 0

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Journal: :Acta Crystallographica Section E Structure Reports Online 2012

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