. "22-cyclopropylmethyl-2-propylamino-14-oxa-11,22-diazaheptacyclo[13.9.1.01,13.02,21.04,12.05,10.019,25]pentacosa-4(12),5(10),6,8,15(25),16,18-heptaen-16-ol" . "6b" . . . . . . . .