This invention involves involves the use of compounds having the following structure: ##STR1## wherein: (a) R is unsubstituted C.sub.1 -C.sub.3 alkanyl or alkenyl; and (b) R' is selected from hydrogen; unsubstituted C.sub.1 -C.sub.3 alkanyl or alkenyl; unsubstituted C.sub.1 -C.sub.3 alkylthio or alkoxy; hydroxy; thiol; cyano; and halo; for preventing or treating of disorders modulated by alpha-2 adrenoceptors. The subject invention also involves novel compounds and compositions.

Esta invenção envolve envolve o uso dos compostos que têm a seguinte estrutura: ## do ## STR1 wherein: (a) R é C.sub.1 unsubstituted - o alkanyl C.sub.3 ou o alkenyl; e (b) R ' é selecionado do hidrogênio; C.sub.1 unsubstituted - Alkanyl C.sub.3 ou alkenyl; C.sub.1 unsubstituted - Alkylthio C.sub.3 ou alkoxy; hydroxy; thiol; cyano; e halo; para impedir ou tratar dos disorders modulou pelos adrenoceptors alpha-2. A invenção sujeita envolve também compostos e composições da novela.