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Table 1 List of analyzed phytotoxins including their respective charge under experimental conditions

From: Phytotoxin sorption to clay minerals

ID Toxin name Toxin class Sum formula CAS Charge at pH 6a
AIL Ailanthone Terpenoid C20H24O7 981-15-7 o
ANI Anisatin Terpenoid C15H20O8 5230-87-5 o
BAC Baccatin III Terpenoid C31H38O11 27548-93-2 o
BIC (+)-Bicuculline Alkaloid C20H17NO6 485-49-4  + 
BRU Brucine Alkaloid C23H26N2O4 357-57-3  + 
CAF Caffeine Alkaloid C8H10N4O2 58-08-2 o
CEV Cevadine Alkaloid C32H49NO9 62-59-9  + 
CIN Cinobufagin Steroid C26H34O6 470-37-1 o
COL Colchicine Alkaloid C22H25NO6 64-86-8 o
CON Convallatoxin Steroid C29H42O10 508-75-8 o
COS (+)-Costunolide Terpenoid C15H20O2 553-21-9 o
CUE Cucurbitacin E Terpenoid C32H44O8 18444-66-1 o
CYT (−)-Cytisine Alkaloid C11H14N2O 485-35-8  + 
DAB 10-Deacetylbaccatin III Terpenoid C29H36O10 32981-86-5 o
DIG Digitoxigenin Steroid C23H34O4 143-62-4 o
ECH Echimidine Alkaloid C20H31NO7 520-68-3  + 
ERU Erucifoline Alkaloid C18H23NO6 40158-95-0  + /o
ERUNO Erucifoline N-oxide Alkaloid C18H23NO7 123864-94-8  
GAL Galanthamine Alkaloid C17H21NO3 357-70-0  + 
GEL Gelsemine Alkaloid C20H22N2O2 509-15-9  + 
GRA Gramine Alkaloid C11H14N2 87-52-5  + 
HEL Heliotrine Alkaloid C16H27NO5 303-33-3  + 
HOR Hordenine Amine C10H15NO 539-15-1  + 
ISC (+)-Isocorydine Alkaloid C20H23NO4 475-67-2  + /o
JAC Jacobine Alkaloid C18H25NO6 6870-67-3  + /o
LAS Lasiocarpine Alkaloid C21H33NO7 303-34-4  + 
LASNO Lasiocarpine N-oxide Alkaloid C21H33NO8 127-30-0  
LAT Lathyrol Terpenoid C20H30O4 34420-19-4 o
LYC Lycopsamine Alkaloid C15H25NO5 10285-07-1  + 
LYO Lycorine Alkaloid C16H17NO4 476-28-8  + /o
MAT Matrine Alkaloid C15H24N2O 519-02-8  + 
MON Monocrotaline Alkaloid C16H23NO6 315-22-0  + /o
NIC Nicotine Alkaloid C10H14N2 65-31-6  + 
NUC (−)-Nuciferine Alkaloid C19H21NO2 475-83-2  + 
OLE Oleandrin Steroid C32H48O9 465-16-7 o
PAR Parthenolide Terpenoid C15H20O3 20554-84-1 o
PIC Picrotoxinin Terpenoid C15H16O6 17617-45-7 o
PIL Pilocarpine Alkaloid C11H16N2O2 54-71-7  + 
PRO Protopine Alkaloid C20H19NO5 130-86-9  + 
PTB Pterosin B Terpenoid C14H18O2 34175-96-7 o
QUI (−)-Quinine Alkaloid C20H24N2O2 130-95-0  + 
REC Retronecine Alkaloid C8H13NO2 480-85-3  + 
RET Retrorsine Alkaloid C18H25NO6 480-54-6  + /o
SAT α-Santonin Terpenoid C15H18O3 481-06-1 o
SEK Senkirkine Alkaloid C19H27NO6 2318-18-5  + /o
SEN Senecionine Alkaloid C18H25NO5 130-01-8  + /o
SENNO Senecionine N-oxide Alkaloid C18H25NO6 13268-67-2  
SOP Sophocarpine Alkaloid C15H22N2O 6483-15-4  + 
STR Strophanthidin Steroid C23H32O6 66-28-4 o
STY (−)-Strychnine Alkaloid C21H22N2O2 57-24-9  + 
VIN (+)-Vincamine Alkaloid C21H26N2O3 1617-90-9  + 
YOH Yohimbine Alkaloid C21H26N2O3 146-48-5  + 
  1. ao = neutral at pH 6; +  = protonated at pH 6 (base pKa > 6.5);  + /o = partially protonated/partially neutral (5.5 < base pKa < 6.5)