1D NMR (1H, 13C NMR, DEPT-132) and 2D NMR (COSY, HSQC, HMBC) for Osimertinib Mesylate in Methanol-d4 and DP in DMSO-D6 respectively data assignments^a

Osimertinib Mesylate refer Figure 3

Degradation Product refer Figure 3

Position

Types of Carbon (OSM-API) (multiplicity)

13C (δ ppm)/ 1H(δ ppm)

DEPT-135

13C(δ ppm)/ 1H(δ ppm)

DEPT-135

COSY

(H-H)

HSQC

(H-C)

HMBC

(H-C)

1

N

-/-

-/-

-

-

-

-

2

CH (s)

132.6/8.17

CH

137.45/8.6

CH

H-2

C-2

C-3, C-4, C-10, C-5

3

C

113.16/-

-

112.89/-

-

-

-

-

4

C

125.80/-

-

125.81/-

-

-

-

-

5

C

138.67/-

-

121.8/-

-

-

-

-

6

CH (d)

109.62/7.46

CH

110.97/7.88

CH

H-7

C-6

C-4, C-8

7

CH (t)

121.07/7.25

CH

121.84/7.25

CH

H-6, H-8, H-9

C-7

C-5, C-9

8

CH (t)

122.17/7.17

CH

121.29/7.14

CH

H-7, H-6

C-8

C-4, C-6

9

CH (d)

121.37/8.35

CH

122.43/8.22

CH

H-8, H-7

C-9

C-3, C-5, C-7

10

CH₃ (s)

32/3.9

CH₃

33.39/3.92

CH₃

H-10

C-10

C-2, C-5

11

C

159.53/-

-

160.39/-

-

-

-

-

12

N

-/-

-

-/-

-

-

-

-

13

C

163.22/-

-

162.08/-

-

-

-

-

14

N

-/-

-

-/-

-

-

-

-

15

CH (d)

156.38/8.28

CH

138.18/8.31

CH

H-16

C-15

C-13, C-11, C-16

16

CH (d)

107.62/7.23

CH

107.51/7.22

CH

H-15

C-16

C-11, C-15, C-3

17

NH

-/*

-

-/7.01

-

-

-

-

18

C

124.17/-

-

160.396/-

-

-

-

-

19

C

148.07/-

-

146.23/-

-

-

-

-

20

CH (s)

103.07/6.99

CH

105.72/7.88

CH

H-20

C-20

C-32, C-21, C-19, C-18

21

C

138.19/-

-

134.28/-

-

-

-

-

22

C

126.23/-

-

164.25/-

-

-

-

-

23

CH (s)

117.74/8.86

CH

113.91/9.04

CH

H-23

C-23

C-22, C-21, C-19, C-18

24

O

-/-

-

-/-

-

-

-

-

25

CH₃ (s)

55.47/4.03

CH₃

56.47/3.84

CH₃

H-25

C-25

C-19

26

N

/-

-

-/-

-

-

-

-

27

CH₃ (s)

38.07/2.74

CH₃

43.33/2.69

CH₃

H-27

C-27

C-21, C-31

28

NH

-/*

-

-/9.88

-

H-28

-

C-21, C-23, C-29

29

C

165.75/-

-

168.84/-

-

-

-

-

30

O

-/-

-

-/-

-

-

-

-

31

CH₂ (t)

54.39/3.2

CH₂

57.28/2.92

CH₂

H-32

C-31

C-21, C-27, C-32

32

CH₂ (t)

47.31/3.50

CH₂

55.60/2.34

CH₂

H-31

C-32

C-34, C-37

33

N

-/-

-

-/-

-

-

-

-

34

CH₃ (s)

42.01/2.88

CH₃

45.62/2.24

CH₃

H-34

C-34

C-32