“…The fractions containing the bilane (bromine vapor was used for visualization) were combined and evaporated to dryness: 18 mg (12%); mass spectrum,21 m/e (21) See ref 4 for the fragmentation pattern of this type of bilane. (relative intensity) 933, (M+, 16), 475 (100), 471 (40), 462 (60), 459 (compound 19, 53), 222 (50); NMR 5 2.79 (br, 12 H, CHjCHjCOa), 3.09 (br, 4 H, CH2CH2CONH), 3.46,3.52,3.55, 3.66 (4 s, 29 H, CH2, OCHg), 3.70 (m, 6 H, pyrr-CH2-pyrr), 4.17 (m, 2 H, CH2NH), 6.21 (br, 1 H, NHCO), 6.37 (br, 1 , H-l'), 8.65, 8.89,8.91 (2 s, 3 , NH). The bilane 27 was pure when examined by TLC (4% methanol in chloroform).…”