TY - RPRT TI - Non-mutagenic organic pigment intermediates. I. 3,3'-dipropoxybenzidine. AU - Ahmed El-Shafei AU - Paul D Boyle AU - David Hinks AU - Harold S Freeman PY - 2003 DO - 10.1107/s0108270102021303 UR - https://pubmed.ncbi.nlm.nih.gov/12574658/ ID - 12574658 ER -