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Levomethorphan is the l-stereoisomer of methorphan. The effects of the two isomers are quite different. Dextromethorphan is an antitussive at low doses and a dissociative at much higher doses, whereas levomethorphan is an opioid analgesic. Levomethorphan has effects similar to levorphanol but is less potent as it must be demethylated to the active form by liver enzymes before becoming active. Read more... or Edit at Wikipedia...
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( -)-3-Me​thoxy-17-​methylmor​phinan

(-)-cis-1​,3,4,9,10​,10a-Hexa​hydro-6-m​ethoxy-11​-methyl-2​H-10,4a-i​minoethan​ophenanth​ren

(+)-3-Met​hoxy-17-m​ethylmorp​hinan

(+-)-3-Me​thoxy-N-m​ethylmorp​hinan

125-68-8 [RN]

125-70-2 [RN]

204-751-7 [EINECS/ELINCS]

3-Methoxy​-17-methy​lmorphinan

l-3-Metho​xy-17-met​hylmorphi​nan

morphinan​, 3-metho​xy-17-met​hyl-

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Database ID(s)

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ACD/LogP: 4.11 # of Rule of 5 Violations: 0
ACD/LogD (pH 5.5): 1.12 ACD/LogD (pH 7.4): 2.39
ACD/BCF (pH 5.5): 1 ACD/BCF (pH 7.4): 14.9
ACD/KOC (pH 5.5): 4.22 ACD/KOC (pH 7.4): 78.03
#H bond acceptors: 2 #H bond donors: 0
#Freely Rotating Bonds: 1 Polar Surface Area: 12.47 Å2
Index of Refraction: 1.585 Molar Refractivity: 81.76 cm3
Molar Volume: 243.8 cm3 Polarizability: 32.41 10-24cm3
Surface Tension: 44.9 dyne/cm Density: 1.11 g/cm3
Flash Point: 116.2 °C Enthalpy of Vaporization: 64.5 kJ/mol
Boiling Point: 394.9 °C at 760 mmHg Vapour Pressure: 1.92E-06 mmHg at 25°C
            
 Log Octanol-Water Partition Coef (SRC):
    Log Kow (KOWWIN v1.67 estimate) =  3.60

 Boiling Pt, Melting Pt, Vapor Pressure Estimations (MPBPWIN v1.42):
    Boiling Pt (deg C):  348.86  (Adapted Stein & Brown method)
    Melting Pt (deg C):  126.52  (Mean or Weighted MP)
    VP(mm Hg,25 deg C):  1.36E-005  (Modified Grain method)
    Subcooled liquid VP: 0.00014 mm Hg (25 deg C, Mod-Grain method)

 Water Solubility Estimate from Log Kow (WSKOW v1.41):
    Water Solubility at 25 deg C (mg/L):  155.2
       log Kow used: 3.60 (estimated)
       no-melting pt equation used

 Water Sol Estimate from Fragments:
    Wat Sol (v1.01 est) =  138.47 mg/L

 ECOSAR Class Program (ECOSAR v0.99h):
    Class(es) found:
       Aliphatic Amines
       Vinyl/Allyl Ethers

 Henrys Law Constant (25 deg C) [HENRYWIN v3.10]:
   Bond Method :   3.47E-006  atm-m3/mole
   Group Method:   Incomplete
 Henrys LC [VP/WSol estimate using EPI values]:  3.129E-008 atm-m3/mole

 Log Octanol-Air Partition Coefficient (25 deg C) [KOAWIN v1.10]:
  Log Kow used:  3.60  (KowWin est)
  Log Kaw used:  -3.848  (HenryWin est)
      Log Koa (KOAWIN v1.10 estimate):  7.448
      Log Koa (experimental database):  None

 Probability of Rapid Biodegradation (BIOWIN v4.10):
   Biowin1 (Linear Model)         :  -0.1182
   Biowin2 (Non-Linear Model)     :   0.0003
 Expert Survey Biodegradation Results:
   Biowin3 (Ultimate Survey Model):   2.1238  (months      )
   Biowin4 (Primary Survey Model) :   3.0050  (weeks       )
 MITI Biodegradation Probability:
   Biowin5 (MITI Linear Model)    :   0.0713
   Biowin6 (MITI Non-Linear Model):   0.0129
 Anaerobic Biodegradation Probability:
   Biowin7 (Anaerobic Linear Model): -1.9712
 Ready Biodegradability Prediction:   NO

Hydrocarbon Biodegradation (BioHCwin v1.01):
    Structure incompatible with current estimation method!

 Sorption to aerosols (25 Dec C)[AEROWIN v1.00]:
  Vapor pressure (liquid/subcooled):  0.0187 Pa (0.00014 mm Hg)
  Log Koa (Koawin est  ): 7.448
   Kp (particle/gas partition coef. (m3/ug)):
       Mackay model           :  0.000161 
       Octanol/air (Koa) model:  6.89E-006 
   Fraction sorbed to airborne particulates (phi):
       Junge-Pankow model     :  0.00577 
       Mackay model           :  0.0127 
       Octanol/air (Koa) model:  0.000551 

 Atmospheric Oxidation (25 deg C) [AopWin v1.92]:
   Hydroxyl Radicals Reaction:
      OVERALL OH Rate Constant = 375.8308 E-12 cm3/molecule-sec
      Half-Life =     0.028 Days (12-hr day; 1.5E6 OH/cm3)
      Half-Life =    20.491 Min
   Ozone Reaction:
      OVERALL Ozone Rate Constant =     5.187500 E-17 cm3/molecule-sec
      Half-Life =     0.221 Days (at 7E11 mol/cm3)
      Half-Life =      5.302 Hrs
   Fraction sorbed to airborne particulates (phi): 0.00923 (Junge,Mackay)
    Note: the sorbed fraction may be resistant to atmospheric oxidation

 Soil Adsorption Coefficient (PCKOCWIN v1.66):
      Koc    :  8914
      Log Koc:  3.950 

 Aqueous Base/Acid-Catalyzed Hydrolysis (25 deg C) [HYDROWIN v1.67]:
    Rate constants can NOT be estimated for this structure!

 Bioaccumulation Estimates from Log Kow (BCFWIN v2.17):
   Log BCF from regression-based method = 2.069 (BCF = 117.2)
       log Kow used: 3.60 (estimated)

 Volatilization from Water:
    Henry LC:  3.47E-006 atm-m3/mole  (estimated by Bond SAR Method)
    Half-Life from Model River:      279.7  hours   (11.65 days)
    Half-Life from Model Lake :       3189  hours   (132.9 days)

 Removal In Wastewater Treatment:
    Total removal:              15.67  percent
    Total biodegradation:        0.20  percent
    Total sludge adsorption:    15.30  percent
    Total to Air:                0.17  percent
      (using 10000 hr Bio P,A,S)

 Level III Fugacity Model:
           Mass Amount    Half-Life    Emissions
            (percent)        (hr)       (kg/hr)
   Air       0.0187          0.605        1000       
   Water     14.1            1.44e+003    1000       
   Soil      84.3            2.88e+003    1000       
   Sediment  1.56            1.3e+004     0          
     Persistence Time: 1.59e+003 hr