cannot pip install

[helenadeus]

getting this after pip install
Could you provide a requirements.txt per your pip freeze? Appreciate it

import chemcrow
Traceback (most recent call last):
File "", line 1, in
File "..../chemcrow-public-main/chemcrow/init.py", line 1, in
from .tools.rdkit import *
File ".../chemcrow-public-main/chemcrow/tools/init.py", line 3, in
from .rdkit import * # noqa
^^^^^^^^^^^^^^^^^^^^
File ".../chemcrow-public-main/chemcrow/tools/rdkit.py", line 1, in
from langchain.tools import BaseTool
ModuleNotFoundError: No module named 'langchain'