other etheno adducts , i.e. , 1 , n6-ethenoadenine and 3 , n4-ethenocytosine , are readily formed with dna , vinyl chloride , and a metabolizing system in vitro and with rna in vivo , but usually are not detected as dna adducts in vivo .
C0012854
dna
C0242958
dna adducts