( -)-B 7-1453 177334-52-0 2-exo,3-endo,5-exo-9,9,10,10-Heptachlorobornane B 7-1453 Bicyclo(221)heptane, 2,3,5-trichloro-1,7-bis(dichloromethyl)-7-methyl-, (1R,2R,3R,4S,5S,7R)-rel- Bicyclo(221)heptane, 2,3,5-trichloro-1,7-bis(dichloromethyl)-7-methyl-, (2-exo,3-endo,5-exo,7-syn)- HeptaCB 3207 Heptachlorobornane 3207 HpCB 3207 Tox 7