@misc{indiciae7795a9d2ec00,
  title = {Naturally occurring optically active flavans.},
  author = {R G Cooke and J G Down},
  year = {1970},
  doi = {10.1016/s0040-4039(01)97900-6},
  url = {https://pubmed.ncbi.nlm.nih.gov/5439235/},
  note = {Source identifier: 5439235}
}