12580 2012-03-01 16:46 IP:合肥
X20010169   30mg的   [更多]
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jcl614 2013-08-17 09:28 IP:武汉
某药物,需要测定羟胺的残留,但是目前所采用的分光光度法(Fe-邻二氮菲显色、溴甲酚紫显色)、GC衍生化法(成丙酮肟法)均不可行(回收率达不到要求,样品对测定有干扰),求有经验者指引并能解决这一难题。谢谢!   [更多]
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tangjiping1986 2016-09-09 16:40 IP:上海
weiliang123 2019-08-29 16:24 IP:重庆
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mengyaya 2020-03-26 14:49 IP:北京
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daxiao 2011-09-05 13:05 IP:重庆
  求购欧洲药典EP标准品目录(中文)1.要求是最新的目录,至少是2010年的目录,   2. 要求产品目录要完整,至少要包括:产品名称,CAS号,价格,规格等,产品名称为中文   3. 格式不限,只要文字可以复制就行。可以是PDF或者是word或,数据库格式更好   [更多]
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lygyanggang 2021-12-06 11:03 IP:连云港
求购碘佛醇注册标准JX20170092   [更多]
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永达化工 2012-09-24 14:31 IP:济南
Disulfiram 我想要一份USP版本的分析单   [更多]
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taideng 2012-03-07 23:02 IP:重庆
1.要求是中国药典2010年版一部word版,不是二部、三部,也不是pdf版 2.要求word版是正式的标准,而不是标准修改稿 3.不需要中药材部份(我已有),只需要中成药部分 4.要求基本没有错误,不有用PDF的复制或转化,这样错误太多。 5.网上随便搜索来的东西我已有,都不符合上面的要求,请不要投稿   [更多]
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changxin 2012-09-26 21:59 IP:重庆
任务材料需要提供与化合物相匹配的核心结构和每种化合物合成的详细的参考依据。合格者会得到一定的奖励。将给予每种化合物知识产权转让费9000元,非独家许可使用化合物,以达到研究目的,比如:研究化合物分子的性质和分子衍生物。 Seeking Bicyclic Aminoketones AWARD: varies | DEADLINE: 10/22/12 | ACTIVE SOLVERS: 24 | POSTED: 9/21/12 Source: InnoCentive Challenge ID: 9932910 Type: RTP Detailed Description & Requirements Intellectual Property: In return for the Initial Transfer Fee of $1,500 per compound, you are expected to grant the Seeker only a non-exclusive license to use your compound for internal, research purposes (for example, researching the molecule’s properties or preparing derivatives of the molecule). Material supply of non-commercial compounds matching the shown core structures is desired. For Solvers’ information, procedures for preparing compounds of this type may be found in the following references: Synthesis, 1, 1979, 50. Synthesis, 3, 2010, 493. Tetrahedron, 68 (4), 2012, 1286. J. Organic Chem, 73 (6), 2008, 2114. J. Med. Chem, 37 (18), 1994, 2831. More specifically, the Seeker is looking for compounds that meet the following Requirements: Structure: FeatureRange StructureA bicyclic aminoketone as shown in the structures above. Elements in R and A groupsR = H, Me, or protecting group (preferably Boc) A = A 1-3 membered linker where one atom may be N, O, or S Substituents– In addition to H, the core rings and/or the A linker may be substituted with Me or F. Unsaturation– The core rings and/or the A linker may include an olefin, including an exo olefin, but may not contain any additional carbonyl groups. Additional Rings– The Seeker would prefer compounds that have only the bicyclic structure shown above, however, they may consider compounds with an additional ring fused to the core bicycle. Stereochemistry– The Seeker will only consider compounds which are single diastereomers. In cases where the compound may exist as two enantiomers, the Seeker will consider   [更多]
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