(1S,4R)-1-(1H-indol-3-ylmethyl)-4-propan-2-yl-2,4-dihydro-1H-pyrazino[2,1-b]quinazoline-3,6-dione 在
三氟乙酸 作用下,
反应 2.3h,
以46%的产率得到(1S,12R,15S,23S)-12-propan-2-yl-3,11,14,16-tetrazahexacyclo[12.10.0.02,11.04,9.015,23.017,22]tetracosa-2,4,6,8,17,19,21-heptaene-10,13-dione