M. Chastrette et al., STRUCTURE-ODOR RELATIONSHIPS - USING NEURAL NETWORKS IN THE ESTIMATION OF CAMPHORACEOUS OR FRUITY ODORS AND OLFACTORY THRESHOLDS OF ALIPHATIC-ALCOHOLS, Journal of chemical information and computer sciences, 36(1), 1996, pp. 108-113
Citations number
21
Categorie Soggetti
Information Science & Library Science","Computer Application, Chemistry & Engineering","Computer Science Interdisciplinary Applications",Chemistry,"Computer Science Information Systems
Structure-odor relationships were established for a sample of 99 aliph
atic alcohols using a three-layer backpropagation neural network. The
molecular structure was described using a common skeleton with six pos
sible substitutions. Substituents were described using only their van
der Waals volumes. The discrimination between fruity and camphoraceous
odors of 67 compounds gave good results in classification (100%) and
prediction (85%) phases. With the global set, the network correctly cl
assified and predicted the camphoraceous character of compounds (100%
and 95% respectively) but gave poorer results for the fruity character
(87% and 74% respectively). Calculations of pOLs (pOL = -log (olfacto
ry threshold expressed in mol/L)) of 45 camphoraceous compounds were a
lso made. When all camphoraceous compounds were used to establish the
model, 91% of the pOLs were correctly estimated. When attempts were ma
de to predict the pOL values of 10% of the compounds from a model desi
gned using 90% of the sample, only 74% of the pOLs were correctly esti
mated.