摘要:
Remedies containing as the active ingredient compounds represented by general formula (I) or pharmaceutically acceptable salts thereof, whereby diseases induced by the hypofunction of NOS can be efficaciously prevented or ameliorated, wherein R?1 and R2¿ represent each hydrogen, or R?1 and R2¿ form together a single bond; and R3 represents -CH(OH)CH(OH)CH¿3?, CH(OCOCH3)CH(OCOCH3)CH3, -CH3, -CH2OH or phenyl when R?1 and R2¿ are hydrogen, or R3 represents -COCH(OH)CH¿3? when R?1 and R2¿ form together a single bond.