Abstract: The present invention provides a plant disease control agent containing as active ingredient one or more compounds of the formula ?1!A--COOR.sup.1 ?1!whereinR.sup.1 represents a hydrogen atom or a C.sub.1 -C.sub.4 alkyl group, andA represents a group of the formula (A-1) or (A-2) ##STR1## R.sup.2 represents a C.sub.1 -C.sub.4 alkyl group, R.sup.3 represents a C.sub.1 -C.sub.4 alkyl group,R.sup.4 represents a halogen atom or a C.sub.1 -C.sub.4 alkyl group, andR.sup.5 represents a C.sub.1 -C.sub.4 alkyl group.Further, the compound of A-1 in the formula ?1! in which R.sup.3 is a halogen atom is also included in the present invention.

Abstract: Cyclooctadiene derivative of the following formula (1): ##STR1## wherein A.sup.1, A.sup.2, A.sup.3 and A.sup.4 each independently represent COOR.sup.5 (where R.sup.5 represents a hydrogen atom, a C.sub.1 -C.sub.10 alkyl group, a phenyl group, a C.sub.7 -C.sub.12 aralkyl group or CONR.sup.6 R.sup.7 (where R.sup.6 and R.sup.7 each independently represent a hydrogen atom, a C.sub.1 -C.sub.10 alkyl group or a phenyl group), or A.sup.1 and A.sup.2, and/or A.sup.3 and A.sup.4 may be combined together to represent group(s) of: ##STR2## in which X represents an oxygen atom or NR.sup.8 {where R.sup.8 represents a hydrogen atom, a C.sub.1 -C.sub.10 alkyl group or a phenyl group),R.sup.0, R.sup.1, R.sup.2, R.sup.3 and R.sup.4 each independently represent a hydrogen atom, a halogen atom, a hydroxyl group and an C.sub.1 -C.sub.10 alkyl group,the symbol ------ represents a single or double bond, and when it is a double bond, then R.sup.1 and R.sup.

Abstract: The present invention relates to the compound A of the formula (A), the related compound B, carboxylic acid derived from acid anhydride group of these compounds and esters and salts thereof, microorganisms for producing the compounds, methods for producing the compounds A and/or B by using the microorganisms, and a treated or untreated fermentation broth obtained by culturing strains belonging to genus Zopfiella or Zopfiella curvata No. 37-3 strain. ##STR1## The present invention provides the compounds A and B, derivatives thereof, and treated or untreated fermentation broth obtained by culturing the strains belonging to genus Zopfiella or Zopfiella curvata No. 37-3 strain, which show an excellent activities as antifungal agent and anti-thrombotic agent.

Abstract: The present invention relates to the compound A of the formula (A), the related compound B, carboxylic acid derived from acid anhydride group of these compounds and esters and salts thereof, microorganisms for producing the compounds, methods for producing the compounds A and/or B by using the microorganisms, and a treated or untreated fermentation broth obtained by culturing strains belonging to genus Zopfiella or Zopfiella curvata No. 37-3 strain. ##STR1## The present invention provides the compounds A and B, derivatives thereof, and treated or untreated fermentation broth obtained by culturing the strains belonging to genus Zopfiella or Zopfiella curvata No. 37-3 strain, which show an excellent activities as antifungal agent and anti-thrombotic agent.

Abstract: An efficient process of optical resolution is provided for producing an L-amino acid represented by the following formula (I): ##STR1## wherein R is --CH.sub.2 CO.sub.2 H, --CH.sub.2 CONH.sub.2, --CO.sub.2 H or ##STR2## in which R.sup.1 is hydrogen atom, an alkyl group having 1 to 10 carbon atoms or a halogen-substituted alkyl group having 1 to 10 carbon atoms. The process comprises an optical resolution of an N-substituted carbonyl-D,L-amino acid represented by the formula (II): ##STR3## (wherein R is the same as defined above and R.sup.

Abstract: An oligopeptide is prepared by use of a vector wherein DNA coding for the intended oligopeptide has been introduced into a plasmid including a leader gene and an alpha-amylase structural gene.