Evidence map›Paper›PMID 37248531›Full record

ArticleJournal of cheminformatics2023

Improving the quality of chemical language model outcomes with atom-in-SMILES tokenization.

Umit V Ucak, Islambek Ashyrmamatov, Juyong Lee

Erratum issuedAbstract read
In one paragraph

Article in Journal of cheminformatics, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. An erratum has been issued. Cited by 21 papers.

0numbers the graph read from it
0cells of the map it votes in
21citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

21 citing papers in PubMed.

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  3. A survey on large language models in biology and chemistry.Experimental & molecular medicine · 2026
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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

3 authors.

Umit V Ucak *Department of Molecular Medicine and Biopharmaceutical Sciences, Graduate School of Convergence Science and Technology, Seoul National University, Seoul, Republic of Korea.
Islambek Ashyrmamatov *College of Pharmacy, Seoul National University, Seoul, Republic of Korea.
Juyong LeeResearch Institute of Pharmaceutical Science, Seoul National University, Seoul, Republic of Korea. nicole23@snu.ac.kr.

Funding

Korea Environmental Industry and Technology Institute KEITI:2020002960002Ministry of Education 5120200513755National Research Foundation of Korea NRF-2020M3A9G7103933
6 · The paper itself

Abstract

Tokenization is an important preprocessing step in natural language processing that may have a significant influence on prediction quality. This research showed that the traditional SMILES tokenization has a certain limitation that results in tokens failing to reflect the true nature of molecules. To address this issue, we developed the atom-in-SMILES tokenization scheme that eliminates ambiguities in the generic nature of SMILES tokens. Our results in multiple chemical translation and molecular property prediction tasks demonstrate that proper tokenization has a significant impact on prediction quality. In terms of prediction accuracy and token degeneration, atom-in-SMILES is more effective method in generating higher-quality SMILES sequences from AI-based chemical models compared to other tokenization and representation schemes. We investigated the degrees of token degeneration of various schemes and analyzed their adverse effects on prediction quality. Additionally, token-level repetitions were quantified, and generated examples were incorporated for qualitative examination. We believe that the atom-in-SMILES tokenization has a great potential to be adopted by broad related scientific communities, as it provides chemically accurate, tailor-made tokens for molecular property prediction, chemical translation, and molecular generative models.

Indexed as

Atom-in-SMILESChemical language processingRepetitionTokenization

Identifiers

PMID37248531
PMCPMC10228139

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.