| Substance | Abbreviation | Systematics | Provings |
| L-Cysteinum L-Cysteine |
L-Cys | Products of the Cell Metabolism and Hormons |
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| L-Dopa L-Dopa |
Ldopa | Products of the Cell Metabolism and Hormons |
|
| L-Noradrenalinum-hydrochloricum |
Norad | Products of the Cell Metabolism and Hormons |
|
| Labetalol Labetalol |
Labeta | Synthetic Drugs |
|
| Labradoritum Spectrolithum Spectrolite |
Lap-la | Silikata triclina |
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| Lac condensatum Condensated Milk |
Lac-con | other industrial products |
|
| Lac defloratum Skimmed Cow´s Milk |
Lac-d | Bovidae |
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| Lac humanum Human Breast Milk of one Woman |
Lac-h | Hominidae |
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| Lac maternum Human Breast Milk of Several Women |
Lac-mat | Hominidae |
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| Lac vaccinum Cow´s Milk |
Lac-v | Bovidae |
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