A compound of formula I ##STR1## wherein R is H or R'CO wherein R'CO is an acyl radical of a carboxylic acid, Y.sub.1 is the radical linked to an alpha carbon atom an .alpha.-amino acid, Y.sub.2 is the radical linked to an alpha carbon atom of an .alpha.-amino acid, ##STR2## --CH.sub.2 --S--S--CH.sub.2 --CH.sub.2 --COOH, --(CH.sub.2).sub.p --COOH or --CH.sub.2 --S--Y.sub.3, Y.sub.3 is (C.sub.1-4)alkyl or benzyl optionally substituted by methyl or methoxy, or CH.sub.3 CO--NH--CH.sub.2 --, n is 1 to 4, A.sub.6 is Thr or D-Thr, p is 3 to 5, A.sub.8 is the aminoacyl radical of a neutral, lipophilic L-.alpha.-aminoacid, A.sub.9 is the aminoacyl radical of a neutral, lipophilic L- or D-.alpha.-aminoacid, Z is a polypeptide radical corresponding to the polypeptide radical in positions 10 to 31 of a natural calcitonin or a derivative or analogue thereof having a hypocalcemic effect, wherein, when there is more than one Y.sub.1 radical, these are the same or different, and with the exception of radical A.sub.8, all amino acid radicals may have the L- or D-configuration, with the proviso that when Y.sub.2 is --CH.sub.2 --SH and n is 4, then the N terminal aminoacyl radical is other than H--CyS, have calcitonin like activity.
化合物I的
化学式为##STR1##其中R为H或R'CO,其中R'CO为
羧酸的酰基基团,Y.sub.1为与
α-氨基酸的α-碳原子连接的基团,Y.sub.2为与
α-氨基酸的α-碳原子连接的基团,##STR2##--CH.sub.2--S--S--CH.sub.2--CH.sub.2--COOH,--(CH.sub.2).sub.p--COOH或--CH.sub.2--S--Y.sub.3,Y.sub.3为(C.sub.1-4)烷基或苄基,可选择性地被甲基或甲氧基取代,或CH.sub.3CO--NH--CH.sub.2--,n为1到4,A.sub.6为Thr或D-Thr,p为3到5,A.sub.8为中性、亲脂性L-.alpha.-
氨基酸的
氨酰基基团,A.sub.9为中性、亲脂性L-或D-.alpha.-
氨基酸的
氨酰基基团,Z为
多肽基团,对应于具有
降钙素样活性的天然
降钙素的第10到31位置的
多肽基团或其衍
生物或类似物,当存在多个Y.sub.1基团时,它们相同或不同,除A.sub.8基团外,所有
氨基酸基团都可以具有L-或D-构型,但当Y.sub.2为--CH.sub.2--SH且n为4时,N末端
氨酰基基团不是H--CyS,具有类似于
降钙素的活性。