TETRAHYDROISOQUINOLINE DERIVATIVES,THEIR PREPARATION AND PHARMACEUTICAL COMPOSITIONS CONTAINING THEM

摘要

Compound of the formula …… wherein R1 and R2 are each independently -H or lower alkoxy; R3 and R4 are each independently lower alkyl; and R5 and R6 are each -OCH3, or together form -OCH2O- or -OCH2CH2O-, and pharmaceutically acceptable acid addition salts thereof are disclosed as calcium channel blockers useful for treating cardiovascular disorders, including angina, hypertension and congestive heart failure.