Question: Vinblastine and vincristine are: 
 Options:  <1> Indolemonoterpenic alkaloids, dimeric with antiarrhythmic activity. <2> Alkaloids derived from phenylalanine, monomeric with arrhythmic activity. <3> Indolemonoterpenic alkaloids, dimeric with antitumor activity. <4> Indolemonoterpenic, monomeric alkaloids with antitumor activity. <5> Alkaloids derived from phenylalanine, dimeric and with antitumor activity.
3