6 7 8 9 10 10 Hexachloro 1 5 5 | a

a
gen.	a; are
å
environ.	crique

6 9 9 | a

a
gen.	a; are
å
environ.	crique

hexahydro 6 9 methano 2 3 4 benzo dioxathiephine 3 oxyde