188127-65-3

Basic information

• Product Name: (3beta,5alpha,22S,23S)-3-bromo-5,22,23-trihydroxystigmastan-6-one
• Synonyms: stigmastan-6-one, 3-bromo-5,22,23-trihydroxy-, (3beta,5alpha,22S,23S)-
• CAS NO: 188127-65-3
• Molecular Formula: C₂₉H₄₉BrO₄
• Molecular Weight: 541.601
• Mol File: 188127-65-3.mol
• Article Data: 2

Chemical Properties

• Boiling Point: 621.4°C at 760 mmHg
• Flash Point: 329.6°C
• Density: 1.228g/cm³
• Vapor Pressure: 4.81E-18mmHg at 25°C
• Refractive Index: 1.549
• CAS DataBase Reference: (3beta,5alpha,22S,23S)-3-bromo-5,22,23-trihydroxystigmastan-6-one(CAS DataBase Reference)
• NIST Chemistry Reference: (3beta,5alpha,22S,23S)-3-bromo-5,22,23-trihydroxystigmastan-6-one(188127-65-3)
• EPA Substance Registry System: (3beta,5alpha,22S,23S)-3-bromo-5,22,23-trihydroxystigmastan-6-one(188127-65-3)

Safety Data

• Hazardous Substances Data: 188127-65-3(Hazardous Substances Data)

Upstream product

• 281659-16-3 (22E)-3β-tosyloxystigmast-22-ene-5α,6β-diol 
• 215031-75-7 (22E)-5α-hydroxy-3β-tosyloxystigmast-22-en-6-one 
• 215031-74-6 (22E)-5,6-epoxy-3β-tosyloxystigmast-22-ene 
• 188127-57-3 (22E)-3β-bromo-5-hydroxy-5α-stigmast-22-en-6-one 
• 167958-88-5 (22E)-3β-bromo-5β,6β-epoxystigmast-22-ene 
• 320341-60-4 (22E)-3β-bromostigmasta-5,22-diene 

Relevant articles and documents

In vitro and in vivo antiherpetic activity of three new synthetic brassinosteroid analogues

Brassinosteroids are a novel group of steroids that appear to be ubiquitous in plants and are essential for normal plant growth and development. It has been previously reported that brassinosteroid analogues exert an antiviral activity against herpes simplex virus type 1 (HSV-1) and arenaviruses. In the present study, we report the chemical synthesis of compounds (22S,23S)-3β-bromo-5α,22,23-trihydroxystigmastan-6-one (2), (22S,23S)-5α-fluoro-3β-22,23-trihydroxystigmastan-6-one (3), (22S,23S)-3β,5α,22,23-tetrahydroxy-stigmastan-6-one (4) as well as their antiherpetic activity both in a human conjunctive cell line (IOBA-NHC) and in the murine herpetic stromal keratitis (HSK) experimental model. All compounds prevented HSV-1 multiplication in NHC cells in a dose dependent manner when added after infection with no cytotoxicity. Administration of compounds 2, 3, and 4 to the eyes of mice at 1, 2, and 3 days post-infection delayed and reduced the incidence of HSK, consisting mainly of inflammation, vascularization, and necrosis, compared to untreated, infected mice. However, viral titers of eye washes showed no differences among samples from treated and untreated mice. Since the decrease in the percentage of mice with ocular lesions occurred 5 days after treatment had ended, we suggest that brassinosteroids 2, 3, and 4 did not exert a direct antiviral effect in vivo, but rather may play a role in immune-mediated stromal inflammation, which would explain the improvement of the clinical signs of HSK observed.