E1

Unimolecular elimination

E2

Bimolecular elimination

ED₅₀

Dose that is effective in 50% of test subjects

EDC

1-Ethyl-3-(3’-dimethylaminopropyl)carbodiimide or

EDCI

1-[3-(Dimethylamino)propyl]-3-ethylcarbodiimide hydrochloride

EDTA

Ethylenediaminetetraacetic acid

EE

1-Ethoxyethyl

ee

Enantiomeric excess

EI

Electron impact (in MS)

EOM

Ethoxymethyl

ESR

Electron spin resonance

Et

Ethyl

FAB

Fast atom bombardment (in MS)

Fcm

N-Ferrocenylmethyl

FD

Field distortion (in MS)

FG

Founctional group

FID

Flame ionization detection or Free induced decay (in NMR)

Fm

9-Fluorenylmethyl

FMOC

9-Fluorenylmethylcarbamate

Fp

h⁵

FT

Fourier transform

g

Gram

GC

Gas chromatography

GTP

Guanosine 5’-triphosphate

GUM

Guaiacolmethyl

h

Hour

HATU

N-[(Dimethylamino)(3H-1,2,3-triazolo(4,5-b)pyridine-3-yloxy)methylene]-N-methylmethanaminium hexafluorophosphate or O-(7-azabenzotriazol-1-yl)-1,13,3-tetrmethyluronium hexafluorophosphate

HBn

2-Hydroxybenzyl

HCA

Hexachloroacetone

HETCOR

HETeronuclear Chemical Shift CORrelation

Hex

Hexyl

HIP

1,1,1,3,3,3-Hexafluoro-2-phenylisopropyl

HMBC

Heteronuclear Multiple Bond Coherence

HMDS

1,11,3,3,3-Hexamethyldisilazane

HMO

Huckel molecular orbital

HMPA

Hexamethylphosphoramide

HMPT

Hexamethylphosphoroustriamide

HMQC

Heteronuclear Multiple Quantum Coherence

HOAt

7-Aza-1-hydroxybenzotriazole

HOBT

1-Hydroxybenzotriazole

Hoc

Cyclohexyloxycarbonyl

HOMO

Highest occupied molecular orbital

HPLC

High performance liquid chromatography

HRMS

High-resolution mass spectrum

HSDIS

(Hydroxystyryl)diisopropylsilyl

HSDMS

(Hydroxystyryl)dimethylsilyl

hn

Irradiation with light

Hz

Hertz

hZ/home Z

Homobenzyloxycarbonyl