InChI=1S/C19H18ClNO5/c1-21-12-5-3-2-4-10(12)18(25)16-13(24)7-14-11(17(16)21)6-15(26-14)19(20,8-22)9-23/h2-5,7,15,22-24H,6,8-9H2,1H3