TY  - RPRT
TI  - Naturally occurring optically active flavans.
AU  - R G Cooke
AU  - J G Down
PY  - 1970
DO  - 10.1016/s0040-4039(01)97900-6
UR  - https://pubmed.ncbi.nlm.nih.gov/5439235/
ID  - 5439235
ER  -