---
license: apache-2.0
pipeline_tag: text-generation
tags:
- chemistry
language:
- en
- zh
---
# ChemDFM-13B: An LLM-Based Dialogue Foundation Model for Chemistry
ChemDFM is the pioneering open-sourced dialogue foundation model for Chemistry and molecule science, which is build based on LLaMa-13B. ChemDFM outperforms the open-sourced LLMs in all the typical tasks of chemistry, and even reach comparable or higher performances of GPT-4. For more details, please refer to [our paper](https://arxiv.org/abs/2401.14818).
## News
* **2024-03-07**: The parameter of ChemLLM-13B is open-sourced!
* **2024-01-26**: The paper of ChemLLM-13B is released on arXiv: [ChemDFM: Dialogue Foundation Model for Chemistry](https://arxiv.org/abs/2401.14818)
## Usage Details
The online demo of ChemDFM will be up soon!
### local inference
To load and run ChemDFM locally, here is an example:
```python
import torch
from transformers import LlamaTokenizer, LlamaForCausalLM, GenerationConfig
model_name_or_id = "X-LANCE/ChemDFM-13B-v1.0"
tokenizer = LlamaTokenizer.from_pretrained(model_name_or_id)
model = LlamaForCausalLM.from_pretrained(model_name_or_id, torch_dtype=torch.float16, device_map="auto")
input_text = "Can you please give detailed descriptions of the molecule below?\nCl.O=C1c2c(O)cccc2-c2nn(CCNCCO)c3ccc(NCCNCCO)c1c23"
input_text = f"[Round 0]\nHuman: {input_text}\nAssistant:"
inputs = tokenizer(input_text, return_tensors="pt").to("cuda")
generation_config = GenerationConfig(
do_sample=True,
top_k=20,
top_p=0.9,
temperature=0.9,
max_new_tokens=1024,
repetition_penalty=1.05,
eos_token_id=tokenizer.eos_token_id
)
outputs = model.generate(**inputs, generation_config=generation_config)
generated_text = tokenizer.batch_decode(outputs, skip_special_tokens=True)[0][len(input_text):]
print(generated_text.strip())
```
### input format
To get better responses, we recommend to preprocess your input and history with the dialogue templates which are used during instruction tuning of ChemDFM. Specifically, for an input queries
```python
{'current_query': current_query, 'history': [(query1, answer1), (query2, answer2), ...]}
```
, you can use the following code to preprocess the input and history:
```python
def formatting_input(current_query, history):
input_text = ''
for idx, (query, answer) in history:
input_text += f"[Round {idx}]\nHuman: {query}\nAssistant: {answer}\n"
input_text += f"[Round {len(history)}]\nHuman: {current_query}\nAssistant:"
return input_text
```
### SMILES preprocess
When there involves SMILES notation in your input, we recommend to preprocess the SMILES with the `rdkit` package to canonicalize the SMILES. Here is an example:
```python
from rdkit import Chem
def canonicalize_smiles(smiles):
mol = Chem.MolFromSmiles(smiles)
if mol is None:
return None
return Chem.MolToSmiles(mol, isomericSmiles=True, kekuleSmiles=False)
```
or directly:
```python
from rdkit import Chem
def canonicalize_smiles(smiles):
return Chem.CanonSmiles(smiles, useChiral=True)
```
## Performance
### Chemical Benchmarks
We evaluate the performance of ChemDFM-13B on multiple widely-used benchmarks in chemistry. The detail introduction of the benchmarks can be found in [our paper](https://arxiv.org/abs/2401.14818). The overall performance of ChemDFM-13B is shown below:
### Human Evaluation
We mark the correct and relevant information in the replies in green, the correct but irrelevant information in yellow, and the wrong information in red. In addition, **the key points of the answer** are marked in bold if they appear in the reply.
The results show that while open-sourced LLMs perform well when asked about existing knowledge (Q1), *only ChemDFM can provide correct and comprehensive answers when questions involve new molecules and reactions* (Q2 [\[Yin et al., 2023\]](https://pubs.acs.org/doi/10.1021/jacs.3c07044) & Q3 [\[Dargo et al., 2023\]](https://www.sciencedirect.com/science/article/pii/S1385894723030966))
The above conversation is also inspired by [Yin et al.\[2023\]](https://pubs.acs.org/doi/10.1021/jacs.3c07044). During the dialogue, the researcher wants to selectively oxidize one of the two carbonyl groups of a molecule. However, the
initial solution given by ChemDFM results in both carbonyl groups being oxidized. Through the correction given by the researcher, ChemDFM adjusts its proposal and provides two possible solutions. Finally, the researcher chooses to use protecting groups and ChemDFM further details its advice. *In the dialogue, ChemDFM shows promising capabilities regarding error correction (Round 2) and detailing (Round 3) when handling real-world research scenarios.*
**For more examples and analysis, please refer to [our paper](https://arxiv.org/abs/2401.14818).**
## Citation
```bibtex
@misc{zhao2024chemdfm,
title={ChemDFM: Dialogue Foundation Model for Chemistry},
author={Zihan Zhao and Da Ma and Lu Chen and Liangtai Sun and Zihao Li and Hongshen Xu and Zichen Zhu and Su Zhu and Shuai Fan and Guodong Shen and Xin Chen and Kai Yu},
year={2024},
eprint={2401.14818},
archivePrefix={arXiv},
primaryClass={cs.CL}
}
```
## Disclaimer
Current version of ChemDFM may generate incorrect or misleading information. Please use it with caution and verify the results with domain experts before making any decisions based on the results.
## Contact
If you have any questions or further requests, please contact [Zihan Zhao](mailto:zhao_mengxin@sjtu.edu.cn) and [Lu Chen](mailto:chenlusz@sjtu.edu.cn).