73360-06-2 9H-10-Oxa-1,7b-diazabenzo(5,6)cyclohepta(1,2,3-jk)fluoren-5-ol,1,2,3,11,12,12a,13,13a-octahydro-11-methoxy-1,9-dimethyl-, (9R-(9alpha,11alpha,12abeta,13aalpha))-