Ethylidene-4-nitrophenyl-a-D-Maltoheptaoside

• CAT Number: I042333
• CAS Number: 96597-16-9
• Molecular Formula: C50H77NO38
• Molecular Weight: 1300.13
• Purity: ≥95%
• Synonyms: (4aR,6R,7R,8R,8aS)-6-[(2R,3S,4R,5R,6R)-6-[(2R,3S,4R,5R,6R)-6-[(2R,3S,4R,5R,6R)-6-[(2R,3S,4R,5R,6R)-6-[(2R,3S,4R,5R,6R)-6-[(2R,3S,4R,5R,6R)-4,5-dihydroxy-2-(hydroxymethyl)-6-(4-nitrophenoxy)oxan-3-yl]oxy-4,5-dihydroxy-2-(hydroxymethyl)oxan-3-yl]oxy-4,5-dihydroxy-2-(hydroxymethyl)oxan-3-yl]oxy-4,5-dihydroxy-2-(hydroxymethyl)oxan-3-yl]oxy-4,5-dihydroxy-2-(hydroxymethyl)oxan-3-yl]oxy-4,5-dihydroxy-2-(hydroxymethyl)oxan-3-yl]oxy-2-methyl-4,4a,6,7,8,8a-hexahydropyrano[3,2-d][1,3]dioxine-7,8-diol
• InChI: InChI=1S/C50H77NO38/c1-13-74-12-22-43(75-13)29(64)36(71)50(83-22)89-42-21(11-57)82-49(35(70)28(42)63)88-41-20(10-56)81-48(34(69)27(41)62)87-40-19(9-55)80-47(33(68)26(40)61)86-39-18(8-54)79-46(32(67)25(39)60)85-38-17(7-53)78-45(31(66)24(38)59)84-37-16(6-52)77-44(30(65)23(37)58)76-15-4-2-14(3-5-15)51(72)73/h2-5,13,16-50,52-71H,6-12H2,1H3/t13?,16-,17-,18-,19-,20-,21-,22-,23-,24-,25-,26-,27-,28-,29-,30-,31-,32-,33-,34-,35-,36-,37-,38-,39-,40-,41-,42-,43-,44+,45-,46-,47-,48-,49-,50-/m1/s1
• InChIKey: QOGJBGFYMYQFNE-SECAJZLMSA-N
• SMILES: CC1OCC2C(O1)C(C(C(O2)OC3C(OC(C(C3O)O)OC4C(OC(C(C4O)O)OC5C(OC(C(C5O)O)OC6C(OC(C(C6O)O)OC7C(OC(C(C7O)O)OC8C(OC(C(C8O)O)OC9=CC=C(C=C9)[N+](=O)[O-])CO)CO)CO)CO)CO)CO)O)O

Ethylidene-4-nitrophenyl-α-D-maltoheptaoside (Cat No.: I042333) is a synthetic chromogenic substrate commonly used to assay α-amylase activity. It consists of a maltoheptaose chain with a 4-nitrophenyl group at the reducing end and an ethylidene blocking group at the non-reducing end, which prevents further enzymatic degradation. Upon cleavage by α-amylase, the release of 4-nitrophenol can be quantitatively measured by absorbance at 405 nm. This compound is widely used in enzymology, diagnostics, and biochemical research for studying carbohydrate metabolism and screening enzyme inhibitors.

Reference

[1]. Lorentz K. Routine alpha-amylase assay using protected 4-nitrophenyl-1, 4-alpha-D-maltoheptaoside and a novel alpha-glucosidase. Clin Chem. 2000 May;46(5):644-9.
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