Variable
fluorene
dibenzo_ah_anthracene
zinc
acenaphthene
arsenic
chromium
acenaphthylene
lead
fluoranthene
benz_a_anthracene
naphthalene
anthracene
phenanthrene
nickel
benzo_bj_fluoranthenes
cadmium
benzo_a_pyrene
benzo_ghi_perylene
pyrene
inden_123cd_pyrene
benzo_k_fluoranthene
chrysene