Drug – bio-affecting and body treating compositions – Designated organic active ingredient containing – Having -c- – wherein x is chalcogen – bonded directly to...
Reexamination Certificate
2005-11-15
2005-11-15
Lambkin, Deborah C. (Department: 1626)
Drug, bio-affecting and body treating compositions
Designated organic active ingredient containing
Having -c-, wherein x is chalcogen, bonded directly to...
C514S653000, C548S228000, C564S355000
Reexamination Certificate
active
06964976
ABSTRACT:
Compounds of formula (I) which exhibit excellent immune suppression activity, pharmacologically acceptable salts thereof, esters thereof or other derivatives:wherein R1and R2are a hydrogen atom, an amino protecting group; R3is a hydrogen atom, a hydroxy protecting group; R4is a lower alkyl group; n is an integer from 1 to 6; X is an ethylene group; Y is a C1-C10alkylene group, a C1-C10alkylene group substituted with 1 to 3 substituents selected from substituent group a and b; R5is an aryl group; R6and R7are a hydrogen atom, a group selected from substituent group a; with the proviso when R5is a hydrogen atom, Y is not a single bond or a straight chain C1-C10alkylene group.
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Nara Futoshi
Nishi Takahide
Shimozato Takaichi
Takemoto Toshiyasu
Frishauf Holtz Goodman & Chick P.C.
Lambkin Deborah C.
Sankyo Company Limited
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