| 摘要 |
The present invention relates to a linker shown by the following formula (I):wherein R1 is a group of the formula (A):[wherein R3, R4 and R5 are the same or different hydrogen, etc], etc,R2 is a group which can form a chemical bond to a resin which may be protected by a conventional protective group,A is lower alkylene, etc,X is a leaving group, andm is an integer of 0 or 1,with proviso that A is (C2-C6)alkylene, andm is an integer of 1,when R1 is a group of the formula (A).
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