Product Name Inokosterone
CAS No.: 15130-85-5
Catalog No.: CFN92515
Molecular Formula: C27H44O7
Molecular Weight: 480.6 g/mol
Purity: >=98%
Type of Compound: Steroids
Physical Desc.: Powder
Source: The roots of Achyranthes bidentata Blume.
Solvent: Chloroform, Dichloromethane, Ethyl Acetate, DMSO, Acetone, etc.
Inokosterone is an analgesic drug. It also shows high insect moulting hormone activity.
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Providing storage is as stated on the product vial and the vial is kept tightly sealed, the product can be stored for up to 24 months(2-8C).

Wherever possible, you should prepare and use solutions on the same day. However, if you need to make up stock solutions in advance, we recommend that you store the solution as aliquots in tightly sealed vials at -20C. Generally, these will be useable for up to two weeks. Before use, and prior to opening the vial we recommend that you allow your product to equilibrate to room temperature for at least 1 hour.

Need more advice on solubility, usage and handling? Please email to:

The packaging of the product may have turned upside down during transportation, resulting in the natural compounds adhering to the neck or cap of the vial. take the vial out of its packaging and gently shake to let the compounds fall to the bottom of the vial. for liquid products, centrifuge at 200-500 RPM to gather the liquid at the bottom of the vial. try to avoid loss or contamination during handling.
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    Hydroxylation of steroids at one of the side chain terminal methyl groups, commonly linked to C-26, represents an important regulatory step established in many phyla. Discrimination between the two sites, C-26 and C-27, requires knowing the stereochemistry of the products. 26-Hydroxylation of the insect steroid hormone 20-hydroxyecdysone by a microsomal cytochrome P450 was previously found to be responsible for hormonal resistance in a Chironomus cell line mainly producing the (25S)-epimer of 20,26-dihydroxyecdysone.
    Here, we studied the 25-desoxy analog of 20-hydroxyecdysone, ponasterone A, to elucidate the stereochemistry of the expected 26-hydroxy product, Inokosterone, which occurs as C-25 epimers in nature. We identified the predominant metabolite as the C-25 R epimer of Inokosterone on comparison by RP-HPLC with the (25R)- and (25S)-epimers the stereochemistry of which was confirmed by X-ray crystallography. (25R)-Inokosterone was further oxidized to the 26-aldehyde identified by mass spectroscopy, borohydride reduction and metabolic transformation to 26-carboxylic acid. The (25S)-epimers of Inokosterone and its aldehyde were minor products. With 20-hydroxyecdysone as substrate, we newly identified the (25R)-epimer of 20,26-dihydroxyecdysone as a minor product.
    In conclusion, the present stereochemical studies revealed high regioselectivity of the Chironomus enzyme to hydroxylate both steroids at the same methyl group, denoted C-27.
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    The results indicate that the established HPLC/UV method is suitable for quantitation and pattern recognition analyses for quality evaluation of Achyranthis Radix.

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