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293941622939416225/11/2020 13:00:23NormalNewthis is the reported structure of pseudopterosin H, but it has been corrected to 3S,7S,9S,9aR which can not be traced?
263926752639267525/11/2020 12:55:39NormalNewapparently this is the revised structure of pseudopterosin J (and this may be quoted). the reported structure has ID29394164 (information to be introduced?)
5800580025/11/2020 04:44:46NormalNewWhen I build this structure as represented in my computational chemistry program it determines the chirality at the 4 chiral atoms as R,R,R and R not as R,S,R and R as is given in the systematic name. Why is this? If I convert the R to an S in the program the ribose OH's end up trans to each other. Is this an error in the naming? Thanks for your advise.
581711375817113725/11/2020 03:08:02NormalNewSusan/Mark A search for CAS 72797-17-2 gives this answer & 2342620. It is for the FEMA material (FEMA 3327) defined as 2-ACETYL-3,5(AND 6)-DIMETHYLPYRAZINE, so structure 58171137 is probably correct - best way of dealing with this, when unravelled ! Other is WRONG. Barrie
10966910966924/11/2020 19:43:46NormalNewThe tris(phosphonate)-triazine name does not correspond to this structure. It may represent a salt, but that is not clear.
55962655962624/11/2020 14:13:31NormalNewHey I Wanna Melting Point of 5-thien-2-yl-1,3,4-thiadiazol-2-amine Regards
12219712219701/11/2020 17:25:41NormalNewI think that this molecule is named incorrectly. Since the long chain is longer than the actual cyclic part, it takes the role of the "main chain" and the cyclopropane is actually the attachment. Therefor the name would actually be: 2-cyclopropylbutane.
138636291386362928/10/2020 14:00:21NormalNewthe hydrogen atoms on the carbon is not showing and its coordinates not included in the CIF file
11902811902829/09/2020 21:29:19NormalNewYou made the same error as Pubchem. the actual structure is Hyttel, J.; Arnt, J.; Bøgesø, K.; Christensen, A. V.; Larsen, J.-J; Lembøl, H. L.; Meier, E.; Sánchez, C. (1988). "Neurochemical and behavioural profile of Lu 17-133, (±)-trans-4-[3-(3,4-dichlorophenyl)-indan-1-yl]-1-piperazineethanol, an inhibitor of the uptake of dopamine and noradrenaline". Drug Development Research. 13 (4): 213–230. doi:10.1002/ddr.430130404. ISSN 0272-4391.
7478747821/06/2013 12:12:57NormalNewThe melting point of Diethyl carbonate is frequently referred to in the literature as -43 degC. Recently, we conducted some DSC experiments which produced a melting point of around -754degC. The instrument was confirmed to be in calibration and we began a literature hunt. We found 2 papers by Michael S. Ding(ref.1 and 2), describing experimental procedures by DSC, in which he also found the melting point of diethyl carbonate as -74.3degC, confirming our result. One of the main references for the -43degC melting point of diethyl carbonate is in french and dates back to the 1930's (ref 3). Suppliers of Diethyl carbonate list the melting point at -43degC (lit), but in some literature where the melting point is analysed during the experimental it is reported as -74degC. How can we go about rectifying or highlighting this? References 1. M.S. Ding et al, J. Elec. Soc. 148 (2001) A299-A304. 2. M.S. Ding et al, J. Chem. Eng. Data 49 (2004) 276-282. 3. M.J. Timmermans, Hennaut-Roland M.: Travaux du bureau international d'etalons physico-chimiques IV Etude des constantes physiques de vingt composes organiques. J.Chim.Phys. 27 (1930) 401-442
55386555386505/01/2013 05:49:32NormalNewyour j. het. chem. data source links are dated. I believe Wiley Online has them all now. Journal of Heterocyclic Chemistry 19950807_3A, 19971267_11A
146497631464976303/03/2012 03:08:20NormalNewThe link "Compounds with the same skeleton" in this record doesn't work.
214904552149045513/06/2009 18:13:39NormalNewPlease change type of spectrum from 2D1H13CLR to 2D1H15NLR.


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