NEW MATERIAL:A daitocidins expressed by formula I (R is 12-14C alkyl; X is Val or Ilambdaeu). EXAMPLE:A compound expressed by formula II. USE:A gastric inhibitory agent, gastric ulcer preventing and treating agent, antiphlogistics, platelet aggregation inhibiting agent, antiallergic agent, etc., having H+,K+-adenosine triphosphatase inhibiting action and phospholipase A2 inhibiting action. PREPARATION:For example, Bacillus espi Q-55 (FERM P-9299) separated from the soil of the Minamidaito island is cultivated in a suitable culture medium under aerobic conditions, preferably by shake culture or aerobic culture in preferred conditions at 33-40 deg.C and pH 5.5-7.0 for 3-5 days and the aimed Daitocidins are collected from the cultivation product.
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