a 53693

A 53693 is a rigid catecholamine and a selective adrenergic agonist. A 53693 has affinity to certain alpha receptor subtypes in rat alpha-2 receptors.

Dactylocyclines are novel tetracycline derivatives produced by Dactylosporangium SP. The fermentation of Dactylosporangium sp. (ATCC 53693) produced a mixture of tetracycline derivatives, from which several related tetracycline glycosides, known as rings,