Table 2.

Structures of the principal members of the tetracycline class

Chemical nameStructure
7-Chlortetracycline Embedded Image
5-Hydroxytetracycline
Tetracycline
6-Demethyl-7-chlortetracycline
2-N-Pyrrolidinomethyltetracycline
2-N-Lysinomethyltetracycline
N-Methylol-7-chlortetracycline Embedded Image
6-Methylene-5-hydroxytetracycline (methacycline)
6-Deoxy-5-hydroxytetracycline (doxycycline)
7-Dimethylamino-6-demethyl-6-deoxytetracycline (minocycline)
9-(N,N-Dimethylglycylamido)-6-demethyl-6-deoxytetracycline
9-(N,N-Dimethylglycylamido)-minocycline
9-(t-Butylglycylamido)-minocycline