of the remaining analytes , hexachlorobenzene ( hcb ) , trans-nonachlor ( tnc ) , and heptachlor epoxide ( he ) were found at quantifiable concentrations in 1-10 % of the specimens , whereas o , p'-ddt , o , p'-dde , p , p'-ddd , mirex , alpha-bhc , gamma-bhc , heptachlor , delta-bhc , and aldrin were found in less than 1 % of the serum specimens .
C0019220
heptachlor epoxide
C0019219
heptachlor