There is provided a fluorine-containing ether compound represented by the following formula. R.sup.1R.sup.2CH.sub.2R.sup.3CH.sub.2OCH.sub.2CH(OH)CH.sub.2OCH.sub.2R.sup.3CH.sub.2R.sup.4R.sup.5 (in the formula, R.sup.3 represents a perfluoropolyether chain; R.sup.2 and R.sup.4 represent a divalent linking group having a polar group and may be the same or different from each other; R.sup.1 and R.sup.5 represent a terminal group bonded to an oxygen atom of R.sup.2 or R.sup.4 and may be the same or different from each other; and at least one of R.sup.1 and R.sup.5 is an organic group having 1 to 8 carbon atoms and at least one of hydrogens included in the organic group is substituted by a cyano group).

There is provided a fluorine-containing ether compound represented by the following formula. R.sup.1R.sup.2CH.sub.2R.sup.3CH.sub.2OCH.sub.2CH(OH)CH.sub.2OCH.sub.2R.sup.3CH.sub.2R.sup.4R.sup.5 (in the formula, R.sup.3 represents a perfluoropolyether chain; R.sup.2 and R.sup.4 represent a divalent linking group having a polar group and may be the same or different from each other; R.sup.1 and R.sup.5 represent a terminal group bonded to an oxygen atom of R.sup.2 or R.sup.4 and may be the same or different from each other; and at least one of R.sup.1 and R.sup.5 is an organic group having 1 to 8 carbon atoms and at least one of hydrogens included in the organic group is substituted by a cyano group).

The invention relates to the use of a compound of formula (I) ##STR00001## or a salt thereof for combating animal pests, where the symbols and indices are defined in the specification.

The invention relates to the use of a compound of formula (I) ##STR00001## or a salt thereof for combating animal pests, where the symbols and indices are defined in the specification.

A fluorine-containing ether compound represented by a formula (1) shown below.
R.sup.1(O(CH.sub.2).sub.a).sub.b-[A]-[B]OCH.sub.2R.sup.2CH.sub.2R.sup.3(1)
(In the formula (1), R.sup.1 is an alkyl group which may have a substituent, or an organic group having at least one double bond or triple bond. Further, a represents an integer of 2 to 4, and b is 0 or 1. [A] is represented by a formula (2): (OCH.sub.2CH(OH)CH.sub.2).sub.c (wherein c is 1 or 2). [B] is represented by a formula (3): (O(CH.sub.2).sub.eCH(OH)CH.sub.2).sub.d (wherein d is 0 or 1, and e represents an integer of 2 to 4). However, the sum of c in the formula (2) and d in the formula (3) is 2. R.sup.2 is a perfluoropolyether chain. R.sup.3 is represented by a formula (4): (OCH.sub.2CH(OH)CH.sub.2).sub.2OCH.sub.2(CH.sub.2).sub.fOH (wherein f represents an integer of 2 to 5).

The present invention relates to a compound of formula (I):

##STR00001##

in which: the R.sub.1 and R.sub.2 groups, which may be identical or different, are, independently of one another, a saturated or unsaturated, linear, branched or cyclic hydrocarbon group having from 1 to 15 carbon atoms, preferably from 1 to 10 carbon atoms; the R.sub.3 and R.sub.4 groups, which may be identical or different, are selected, independently of one another, from a hydrogen atom, a methyl group or an ethyl group; the R, R.sub.6 and R.sub.7 groups, which may be identical or different, are selected, independently of one another, from a hydrogen atom or an alkyl group comprising from 1 to 6 carbon atoms; n is an integer of 0 to 20; and m is an integer of 1 to 6.

The present invention relates to a non-aqueous electrolyte additive, and a non-aqueous electrolyte for a lithium secondary battery including the same and a lithium secondary battery, and particularly, to a non-aqueous electrolyte additive having a nitrile group and a propargyl group, and a non-aqueous electrolyte for a lithium secondary battery and a lithium secondary battery, which include the non-aqueous electrolyte additive so that capacity and cycle lifespan characteristics at high temperature can be improved.

A phenol compound represented by the following general formula (1A) makes it possible to provide a phenol compound as an additive for a conductive paste composition having a small decrease in electric conductivity in repetitive elongations and shrinkages and excellent printing processability, a conductive paste composition containing the additive, and a conductive wire made by using the conductive paste composition

##STR00001##

The present invention relates to a marked fatty acid derivative, a precursor compound thereof, and use thereof in a contrast agent. The derivative is represented by formula I: wherein M is .sup.99mTc or Re; R, R.sup.1, R.sup.2, R.sup.3, R.sup.4 and R.sup.5, and A.sub.1-A.sub.12 are independently H, an aliphatic chain or an alicyclic; J, X, and Y are independently absent, or O, S or (II), and J, X, and Y are not simultaneously absent; R.sup.6-R.sup.14 are independently H or an aliphatic chain, and R.sup.13 and R.sup.14 are not H simultaneously; z is 1-6, a is 0-5, b is 0-5, and c is 0-3; d is 0-27, e is 0-27, f is 0-28, g is 0-7, and at least two of d, e, f and g are not 0. The present invention provides a completely novel structure type that can be used for preparing a novel myocardial metabolism contrast agent, possessing important clinical application prospects.

The present invention relates to a marked fatty acid derivative, a precursor compound thereof, and use thereof in a contrast agent. The derivative is represented by formula I: wherein M is .sup.99mTc or Re; R, R.sup.1, R.sup.2, R.sup.3, R.sup.4 and R.sup.5, and A.sub.1-A.sub.12 are independently H, an aliphatic chain or an alicyclic; J, X, and Y are independently absent, or O, S or (II), and J, X, and Y are not simultaneously absent; R.sup.6-R.sup.14 are independently H or an aliphatic chain, and R.sup.13 and R.sup.14 are not H simultaneously; z is 1-6, a is 0-5, b is 0-5, and c is 0-3; d is 0-27, e is 0-27, f is 0-28, g is 0-7, and at least two of d, e, f and g are not 0. The present invention provides a completely novel structure type that can be used for preparing a novel myocardial metabolism contrast agent, possessing important clinical application prospects.