简介：二新Steroidal碱，命名pengbeisineA和pengbeisineB，从FritillariamonathaMigo的新鲜灯泡被孤立。与已知的碱一起。结构作为22,26-imino-17被描绘，23-oxido-5-jerv-6-oxo-2,3β-diol并且22，26-imino-17，23-oxido-5-jerv-6-oxo-2β，3-diol根据分光镜的方法。

简介：Twonewsteroidalalkaloids,isoconkuressineandN-formylconessimine,togetherwith6knownsteroidalalkaloidsincludingconkuressine,conessine,isoconessimine,conimine,conarrhimine,andfuntudienine,wereisolatedfromtheseedsofHolarrhenaantidysenteriacaWall.exA.DC.Theirintrinsicantibacterialactivitiesandsynergisticeffectswithpenicillinandvancomycinwereanalyzedinmethicillinsensitivestaphylococcusaureus(MSSA)andmethicillinresistantstaphylococcusaureus(MRSA).Twoofthesteroidalalkaloidsincludingonenewcompound(N-formylconessimine)showedpotentialantibacterialactivityandpossessedsynergisticeffectswithpenicillinandvancomycin,respectively.

简介：Newmethodsfordehydrogenationofsteroidal2,5（10）-dieneswith2,3-dichloro-5,6-dicyano-1,4-benzoquinone（DDQ）orpyridiniumhydrobromideperbromide（PHP,Py·HBr·Br2）toaromaticAringsteroidinquantitativeyieldinshorttimearedescribed.

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简介：二新C-21steroidalglycosides，mucronatosidesM(1)和N(2)，从白前科植物mucronata的茎被孤立，和一已知的复合stephanosideM(3)。根据化学证据和广泛的分光镜的方法，包括一个维、二维的NMR，二新混合物的结构作为12-O-tigloyl-20-O-N-methylanthraniloylsarcostin3-O--D-glucopyranosyl-(14)被识别-6-deoxy-3-O-methyl--D-allopyranosyl-(14)-(-D-cymaropyranosyl-(14)--D-cymaropyranoside(1)，和12-O-cinnamoyl-20-O-nicotinoyl(20S)-pregn-6-ene-3(,5(,8,12,14(,17,20-heptanol3-O--D-glucopyranosyl-(14)-6-deoxy-3-O-methyl--D-allopyranosyl-(14)--D-cymaropy

简介：Themostimportantriskfactorforstrokeandneurodegenerationisaging.Infact,survivalafterstrokediminisheslargelywithaging.Infact,recoveryafterbrainarteryocclusionisdramaticallyworsenedbyaging,evennormalagingisassociatedwithneurondamageandcognitivedecline.Mechanismsinvolvedinaging-related,cognitivedeclineandsusceptibilitytoneurondamageinstrokeandneurodegenerationarelargelyunknown.Oneofthemostimportant

简介：Thedifferentregioselectiveandstereoselectiveproductswereobtainedbythereductionofstigmast-4,22-dien-3,6-dionewithNaBH4-CH3OHwhendifferentkindsofmetalionswasaddedtothereaction.

简介：IntroductionFritillariahupehensisHsiaoetK.C.HsiaisaliliaceousplantgrowinginthesouthwestdistrictofHubeiProvince,China.ItsbulbshavebeenrecordedinthePharmacopoeiaofthePeople′sRepublicofChinaasoneoftheprincipaltraditionalChineseherbsnamed"Hubeibeimu"[1].