Correction: New acetogenin katsuurallene from Laurencia saitoi collected from Katsuura, Japan

Correction: Natural Products and Bioprospecting (2022) 12:10 10.1007/s13659-022-00328-1

Following publication of the original article [1], the authors reported that the original version of this article unfortunately contained mistakes.

Page 1, section “Abstract”, the originally published texts were: This specimen produced a new polyhalogenated acetogenin, named katsuurallene (1), which structure was determined by the spectral methods, along with known diterpene, deoxyparguerol (2) and triterpene, thyrsiferol (3). The correct text should read: This specimen produced a new polyhalogenated acetogenin, named katsuurallene (1), whose structure was determined by the spectral methods, along with known diterpene, deoxyparguerol (2) and triterpene, thyrsiferol (3).

Page 2, the presentation of Fig. 1 was incorrect. The originally published Fig. 1 was:

The corrected Fig. 1 is given below:

Fig. 1.

Chemical structures of 1–11

Page 2, section “Results and discussion”, four paragraph, the originally published texts were: This meant that two ether rings must be formed between C-4 and C-7 and between C-9 and C-13, leading to a planar structure 1 for katsuurallene. The correct text should read: This meant that two ether rings must be formed between C-4 and C-7 and between C-9 and C-13, leading to a planar structure 1b for katsuurallene.

Page 4, the presentation of Fig. 2 was incorrect. The originally published Fig. 2 was:

The corrected Fig. 2 is given below:

Fig. 2.

Partial structure 1a and planar structure 1b

Page 5, the presentation of Fig. 4 was incorrect. The originally published Fig. 4 was:

The corrected Fig. 4 is given below:

Fig. 4.

Chemical structures of 12–16

The original article [1] has been updated.