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류재하(Jae Ha Ryu),은진희(Jin Hee Eun),이소영(So Young Lee),장준식(Joon Shik Chang),박만기(Man Ki Park),박정일(Jeong Hill Park),한용남(Yong Nam Han),한병훈(Byung Hoon Han) 大韓藥學會 1997 약학회지 Vol.41 No.5
Two alkaloidal components were isolated from the ether soluble part of the MeOH extract of the root bark of Euonymus japonica. Their structures were elucidated by the spectroscopic analylses as the sesquiterpene pyridine alkaloids derived from polyester sesquiterpenes which are characteristically detected in Celastraceae plants. These include macrocycle formed by two ester linkages between dihydro-beta-agarofuran nucleus and pyridinic dibasic acid(compound 1:evoninic acid, compound 2:wilfordic acid). The structure of compound 1[C47H50N2017, mp 161~163oC. [alpha]D28=+31.6o(c, 0.1 in EtOH)] was determined as novel structure named as euojaponine N, and compound 2[C48H57NO18, mp 142~145oC, [alpha]D27=+27.0o(c, 0.1 in EtOH)] was identified as ebenifoline W-I reported from Maytenus ebenifolia.
생약추출물 유도형 Nitric Oxide Synthase 저해활성 검색
류재하,이소영,박재현,이화진,장세란,은진희,김남이,정연수,장미경,최영은,이숙현,손행자,안한나,고혜진 숙명여자대학교 약학연구소 2001 약학논문집-숙명여자대학교 Vol.17 No.-
Nitric Oxide (NO), derived from L-arginine, is produced by two types (constitutive and inducible) of nitric oxide synthase (NOS: cNOS and iNOS). The NO produced in large amounts by the iNOS is known to be responsible for the vasodilation and hypotension observed in septic shock and inflammation. The inhibitors of iNOS, thus, may be useful candidate for the treatment of inflammatory diseases accompanied by the overproduction of NO. We prepared alcoholic extracts of herbal drugs which have been used for the treatment of inflammation in oriental medicine. We have screened the inhibitory activity of NO production in lipopolysaccharide (LPS)-activated macrophages after the treatment of these extracts. Among the 81 kinds of extracts of herbal drugs, 34 extracts showed potent inhibitory activity of NO production above 50% at the concentration of 50 (μg/ml. The inhibitory activities of NO production were also evaluated for several solvent fractions at three different concentrations. Especially, hexane soluble fractions of Agrimonia pilosa, Hydrangea serrata, Machilus thunbergii, Prunella vulgaris, Saussurea lappa, Tussilago farfara, and ethyl acetate soluble fractions of Angelica gigas, Ostericum koreanum, Torilis japonica, Perilla frutescence showed moderate activity at 10 and/ or 25 (μg/ml. These fractions are promising candidates for the study of the activity-guided chromatographic purification of active compounds.