Nissan Chemical Industries Limited

Kyoko Nakayama

Ryozo Sakoda

Hiroo Matsumoto

Kiyotomo Seto

Kazuhiko Ohrai

Yoshimasa Kamikawaji

Yukinori Masuda

A compounds of the formula (I): ##STR1## wherein A represents OH or OC(O)CH.sub.3-n X.sub.n, B represents hydrogen atom, or A and B together represent a bond; R.sup.1 represents hydrogen atom, R.sup.2 represents hydrogen atom, C(Z)CH.sub.3-n X.sub.n or C(Z)NHCH.sub.3-n X.sub.n or R.sup.1 and R.sup.2 together represents (CH.sub.2).sub.m, (CH.sub.2).sub.m-1 C(Z), N(R.sup.3)(CH.sub.2).sub.2 C(Z), (CH.sub.2).sub.m-2 NHC(Z) or (CH.sub.2).sub.m-2 OC(Z) in which X represents fluorine atom, chlorine atom, bromine atom, a methyl group or a methoxy group and n represents 0 or an integer of 1 to 3, Z represents oxygem atom or sulfur atom, m represents an integer of 4 or 5 and R.sup.3 represents hydrogen atom or a methyl group, and pharmacological acceptable salts of the compounds which can form salts, processes therefor and pharmaceutical use of the compounds.

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Funabashi, Japan

Kyoko Nakayama