Supplementary Materials - MDPI

Supplementary Materials Figure S1. 1H NMR spectrum (400 MHz) of nebrosteroid Q (1) in CD3OD. Figure S2. 13C NMR spectrum (100 MHz) of nebrosteroid Q (1) in CD3OD. Figure S3. COSY spectrum (400 MHz) of nebrosteroid Q (1) in CD3OD. Figure S4. HSQC spectrum (400 MHz) of nebrosteroid Q (1) in CD3OD. Figure S5. HMBC spectrum (400 MHz) of nebrosteroid Q (1) in CD3OD. Figure S6. NOESY spectrum (400 MHz) of nebrosteroid Q (1) in CDCl3. Figure S7. 1H NMR spectrum (400 MHz) of nebrosteroid R (2) in CDCl3. Figure S8. 13C NMR spectrum (100 MHz) of nebrosteroid R (2) in CDCl3. Figure S9. COSY spectrum (400 MHz) of nebrosteroid R (2) in CDCl3. Figure S10. HSQC spectrum (400 MHz) of nebrosteroid R (2) in CDCl3. Figure S11. HMBC spectrum (400 MHz) of nebrosteroid R (2) in CDCl3. Figure S12. NOESY spectrum (100 MHz) of nebrosteroid R (2) in CDCl3. Figure S13. 1H NMR spectrum (500 MHz) of nebrosteroid S (3) in CDCl3. Figure S14. 13C NMR spectrum (125 MHz) of nebrosteroid S (3) in CDCl3. Figure S15. COSY spectrum (500 MHz) of nebrosteroid S (3) in CDCl3. Figure S16. HSQC spectrum (500 MHz) of nebrosteroid S (3) in CDCl3. Figure S17. HMBC spectrum (500 MHz) of nebrosteroid S (3) in CDCl3. Figure S18. NOESY spectrum (500 MHz) of nebrosteroid S (3) in CDCl3.

2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19

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2 Figure S1. 1H NMR spectrum (400 MHz) of nebrosteroid Q (1) in CD3OD.

AcO H H HO

H

OH

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3 Figure S2. 13C NMR spectrum (100 MHz) of nebrosteroid Q (1) in CD3OD.

AcO H H HO

H

OH

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4 Figure S3. COSY spectrum (100 MHz) of nebrosteroid Q (1) in CD3OD.

AcO H H HO

H

OH

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5 Figure S4. HSQC spectrum (100 MHz) of nebrosteroid Q (1) in CD3OD.

AcO H H HO

H

OH

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6 Figure S5. HMBC spectrum (100 MHz) of nebrosteroid Q (1) in CD3OD.

AcO H H HO

H

OH

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7 Figure S6. NOESY spectrum (100 MHz) of nebrosteroid Q (1) in CDCl3.

AcO H H HO

H

OH

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8 Figure S7. 1H NMR spectrum (400 MHz) of nebrosteroid R (2) in CDCl3.

H HO OH

H

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9 Figure S8. 13C NMR spectrum (100 MHz) of nebrosteroid R (2) in CDCl3.

H HO OH

H

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10 Figure S9. COSY spectrum (100 MHz) of nebrosteroid R (2) in CDCl3.

H HO OH

H

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11 Figure S10. HSQC spectrum (100 MHz) of nebrosteroid R (2) in CDCl3.

H HO OH

H

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12 Figure S11. HMBC spectrum (100 MHz) of nebrosteroid R (2) in CDCl3.

H HO OH

H

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13 Figure S12. NOESY spectrum (100 MHz) of nebrosteroid R (2) in CDCl3.

H HO OH

H

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14 Figure S13. 1H NMR spectrum (500 MHz) of nebrosteroid S (3) in CDCl3.

H H HO OMe

H

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15 Figure S14. 13C NMR spectrum (125 MHz) of nebrosteroid S (3) in CDCl3.

H H HO OMe

H

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16 Figure S15. COSY spectrum (500 MHz) of nebrosteroid S (3) in CDCl3.

H H HO OMe

H

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17 Figure S16. HSQC spectrum (500 MHz) of nebrosteroid S (3) in CDCl3.

H H HO OMe

H

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18 Figure S17. HMBC spectrum (500 MHz) of nebrosteroid S (3) in CDCl3.

H H HO OMe

H

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19 Figure S18. NOESY spectrum (500 MHz) of nebrosteroid S (3) in CDCl3.

H H HO OMe

H