1.0 2011-09-21 00:38:55 UTC 2015-07-21 06:57:58 UTC FDB024040 25-Hydroxytachysterol3 25-Hydroxytachysterol3 is a hydroxylated derivative of tachysterol3. 25-hydroxytachysterol is converted to 25-hydroxyprevitamin D3, which is then converted to the hydroxyvitamin D3 through a thermally induced rearrangement. It is now established that, during exposure to sunlight, the cutaneous reservoir of 7-dehydrocholesterol converts to previtamin D3. Once this thermally labile previtamin is formed, it undergoes a temperature-dependent isomerization to vitamin D3 over a period of 3 days. The plasma vitamin-D binding protein preferentially translocates vitamin D3 from the skin into the circulation. During prolonged exposure to the sun, the accumulation of previtamin D3 is limited to about 10 to 15% of the original 7-dehydrocholesterol content because the previtamin photoisomerizes to 2 biologically inert photoproducts, lumisterol3 and tachysterol3. (PMID 12617640). 25-Hydroxytachysterol3 is characterized by antirachitic activity and by its ability to elevate serum calcium concentration in conditions of hypoparathyroidism. 25-Hydroxytachysterol3 can be used in the preparation of 25-hydroxydihydrotachysterol 3 (25-OH-DHT3) is considered an effective adjunct in the treatment of hypoparathyroidism, particularly where rapid action in elevating serum calcium concentration is being sought. (25-OH-DHT3) exhibits substantially greater antirachitic activity than DHT 3 [HMDB] 25-Hydroxytachysterol 25-Hydroxytachysterol3 9,10-Secocholesta-5(10),6,8-triene-3,25-diol C27H44O2 400.6371 400.334130652 2-[(E)-2-[(1R,7aR)-1-[(2R)-6-hydroxy-6-methylheptan-2-yl]-7a-methyl-2,3,3a,6,7,7a-hexahydro-1H-inden-4-yl]ethenyl]-3-methylcyclohex-2-en-1-ol 2-[(E)-2-[(1R,7aR)-1-[(2R)-6-hydroxy-6-methylheptan-2-yl]-7a-methyl-1,2,3,3a,6,7-hexahydroinden-4-yl]ethenyl]-3-methylcyclohex-2-en-1-ol 39932-44-0 C[C@H](CCCC(C)(C)O)[C@H]1CCC2([H])C(=CCC[C@]12C)\C=C\C1=C(C)CCCC1O InChI=1S/C27H44O2/c1-19-9-6-12-25(28)22(19)14-13-21-11-8-18-27(5)23(15-16-24(21)27)20(2)10-7-17-26(3,4)29/h11,13-14,20,23-25,28-29H,6-10,12,15-18H2,1-5H3/b14-13+/t20-,23-,24?,25?,27-/m1/s1 REBCKWLPJGCBRY-GYDNJJFKSA-N belongs to the class of organic compounds known as vitamin d and derivatives. Vitamin D and derivatives are compounds containing a secosteroid backbone, usually secoergostane or secocholestane. Vitamin D and derivatives Organic compounds Lipids and lipid-like molecules Steroids and steroid derivatives Vitamin D and derivatives Aliphatic homopolycyclic compounds Hydrocarbon derivatives Secondary alcohols Tertiary alcohols Triterpenoids Alcohol Aliphatic homopolycyclic compound Hydrocarbon derivative Organic oxygen compound Organooxygen compound Secondary alcohol Tertiary alcohol Triterpenoid Solid logp 6.60 ALOGPS logs -5.28 ALOGPS solubility 2.08e-03 g/l ALOGPS logp 5.75 ChemAxon pka_strongest_acidic 18.42 ChemAxon pka_strongest_basic -0.98 ChemAxon iupac 2-[(E)-2-[(1R,7aR)-1-[(2R)-6-hydroxy-6-methylheptan-2-yl]-7a-methyl-2,3,3a,6,7,7a-hexahydro-1H-inden-4-yl]ethenyl]-3-methylcyclohex-2-en-1-ol ChemAxon average_mass 400.6371 ChemAxon mono_mass 400.334130652 ChemAxon smiles C[C@H](CCCC(C)(C)O)[C@H]1CCC2([H])C(=CCC[C@]12C)\C=C\C1=C(C)CCCC1O ChemAxon formula C27H44O2 ChemAxon inchi InChI=1S/C27H44O2/c1-19-9-6-12-25(28)22(19)14-13-21-11-8-18-27(5)23(15-16-24(21)27)20(2)10-7-17-26(3,4)29/h11,13-14,20,23-25,28-29H,6-10,12,15-18H2,1-5H3/b14-13+/t20-,23-,24?,25?,27-/m1/s1 ChemAxon inchikey REBCKWLPJGCBRY-GYDNJJFKSA-N ChemAxon polar_surface_area 40.46 ChemAxon refractivity 125.98 ChemAxon polarizability 50.59 ChemAxon rotatable_bond_count 7 ChemAxon acceptor_count 2 ChemAxon donor_count 2 ChemAxon physiological_charge 0 ChemAxon formal_charge 0 ChemAxon Specdb::CMs 15672 Specdb::CMs 39064 Specdb::CMs 135972 Specdb::CMs 143706 Specdb::MsMs 300715 Specdb::MsMs 300716 Specdb::MsMs 300717 Specdb::MsMs 343051 Specdb::MsMs 343052 Specdb::MsMs 343053 Specdb::MsMs 2727904 Specdb::MsMs 2727905 Specdb::MsMs 2727906 Specdb::MsMs 2980520 Specdb::MsMs 2980521 Specdb::MsMs 2980522 HMDB06722 #<Reference:0x000055ce321c73b0> Anatidae Type 1 specific Anatidae 8830 Beefalo Type 1 specific Bos taurus X Bison bison 297284 Bison Type 1 specific Bison bison 9901 Buffalo Type 1 specific Bubalus bubalis 89462 Cattle (Beef, Veal) Type 1 specific Bos taurus 9913 Chicken Type 1 specific Gallus gallus 9031 Columbidae (Dove, Pigeon) Type 1 specific Columbidae 8930 Deer Type 1 specific Cervidae 9850 Domestic goat Type 1 specific Capra aegagrus hircus 9925 Domestic pig Type 1 specific Sus scrofa domestica 9825 Elk Type 1 specific Cervus canadensis 1574408 Emu Type 1 specific Dromaius novaehollandiae 8790 European rabbit Type 1 specific Oryctolagus 9984 Greylag goose Type 1 specific Anser anser 8843 Guinea hen Type 1 specific Numida meleagris 8996 Horse Type 1 specific Equus caballus 9796 Mallard duck Type 1 specific Anas platyrhynchos 8839 Mountain hare Type 1 specific Lepus timidus 62621 Mule deer Type 1 specific Odocoileus 9871 Ostrich Type 1 specific Struthio camelus 8801 Pheasant Type 1 specific Phasianus colchicus 9054 Quail Type 1 specific Phasianidae 9005 Rabbit Type 1 specific Leporidae 9979 Rock ptarmigan Type 1 specific Lagopus muta 64668 Sheep (Mutton, Lamb) Type 1 specific Ovis aries 9940 Squab Type 1 specific Columba 8931 Turkey Type 1 specific Meleagris gallopavo 9103 Velvet duck Type 1 specific Melanitta fusca 371864 Wild boar Type 1 specific Sus scrofa 9823