| abstract |
PRECISION OF DISCLOSURE The invention relates to the preparation of derivatives. (I) where R is hydrogen, alkyl (1 to 5 carbons), or aralcoyl (7 to 12 carbons), optionally substituted, and R1 is hydro-gene, alkyl (1 to 5 carbons), cylcloalcoylalcoyle (4 to 7 carbons) or aralcoyl (7 to 12 carbons), possibly subs-titrated, and from derivatives II or IV where R 'has the meaning of R, with the exception of hydrogen. The derivatives I are hypotensive and antihypertensive. |