a novel anti - serotonergic compound and the synthetic intermediates thereof are provided . the compound and intermediates are pyrazolopyridine compounds represented by the formula , ## str1 ## wherein r 1 represents -- oh , -- och 2 - ph , ## str2 ## or -- o -- ch 2 -- ch -- ch 2 -- nh -- ch 2 ; and r 2 is h or -- coor . among the compounds of the above formula , a compound wherein r 1 is -- o -- ch 2 -- ch -- ch 2 -- nh -- ch 2 has anti - serotonergic activity and can be synthesized , for example , by way of compounds wherein r 1 is och 2 ph and r 2 is coor , r 1 is -- oh and r 2 is h , and r 1 is ## str3 ## and r 2 is h , in order .